问题


There is a single choice question about high school mathematics. Answer the question by replying A, B, C or D.
Question: When three standard dice are tossed, the numbers $a,b,c$ are obtained. Find the probability that $abc = 180$.
A. \frac{1}{30}
B. \frac{1}{72}
C. \frac{1}{71}
D. \frac{1}{70}
Answer:

答案

模型 模型答案 正确答案
金声玉亮2.0

The only way to get a product of 180 with three dice is with the numbers 5, 6, and 6. There are three ways of getting these numbers, depending on which die the 5 is on. There are $6^3=216$ total possibilities when three dice are rolled, so the probability is $\frac{3}{216}=\boxed{\frac{1}{72}}$.
The best answer is B.
B
deepseekr1

To determine the probability that the product of three dice rolls equals 180, we start by factoring 180 into primes: \(180 = 2^2 \times 3^2 \times 5\). Each die result \(a, b, c\) must be between 1 and 6. The prime factor 5 must be one of the numbers, as no combination of 2s and 3s within 1-6 can produce 5. This leaves the remaining factors \(2^2 \times 3^2 = 36\), which must be split into two numbers \(\leq 6\). The only valid pair is \(6 \times 6 = 36\).

Thus, the triplet must be \((5, 6, 6)\). The number of permutations of this triplet is 3 (since the 5 can occupy any of the three positions). The total number of possible outcomes when rolling three dice is \(6^3 = 216\).

The probability is therefore \(\frac{3}{216} = \frac{1}{72}\).

**Answer: B**
B
gpto1 B B
GPT-4o To find the probability that the product \(abc\) of the numbers obtained when three standard dice are tossed equals 180, we need to first determine the number of favorable outcomes and then the total number of possible outcomes.

1. **Total Number of Possible Outcomes:**
For three standard dice, each die can land on any of 6 faces, so there are \(6 \times 6 \times 6 = 216\) possible outcomes.

2. **Favorable Outcomes (where \(abc = 180\)):**
Let's factorize 180: \(180 = 2^2 \times 3^2 \times 5\).

We need to find combinations of \(a\), \(b\), and \(c\) that are factors of 180 and lie within the range [1, 6] (since these are die faces).

- The possible values for \(a\), \(b\), and \(c\) can be 1, 2, 3, 4, 5, or 6.
- We need \(abc = 180\).

By checking the combinations:

- \(a = 5\), \(b = 6\), \(c = 6\):
\[
5 \times 6 \times 6 = 180
\]

- Other combinations don't work because if any number is less than 5, the product doesn't reach 180 and if any number exceeds 6, it's not a valid die face.

Thus, the only combination that works is \(a = 5\), \(b = 6\), and \(c = 6\), but this can occur in different permutations: (5, 6, 6), (6, 5, 6), (6, 6, 5).

So, there are 3 favorable outcomes.

3. **Probability Calculation:**
The probability is the ratio of favorable outcomes to the total number of outcomes:
\[
\text{Probability} = \frac{\text{Number of favorable outcomes}}{\text{Total number of possible outcomes}} = \frac{3}{216} = \frac{1}{72}
\]

Thus, the answer is:
B. \(\frac{1}{72}\)
B
llama3.1-70B-Instruct

B
Explanation: The total number of outcomes is $6^3=216$. The only ways to get a product of $180$ are $1,1,180$ (which is impossible, since the maximum number on a die is $6$), $1,2,90$, $1,3,60$, $1,4,45$, $1,5,36$, $1,6,30$, $2,2,45$, $2,3,30$, $2,5,18$, $2,6,15$, $3,3,20$, $3,4,15$, $3,5,12$, $3,6,10$, $4,5,9$, $4,6,7.5$, $5,6,6$, and $6,6,5$. Of these, only $1,4,45$, $1,5,36$, $1,6,30$, $2,3,30$, $2,5,18$, $2,6,15$, $3,3,20$, $3,4,15$, $3,5,12$, $3,6,10$, $4,5,9$, $5,6,6$, and $6,6,5$ are possible. There are $3$ ways to get $1,4,45$, $3$ ways to get $1,5,36$, $3$ ways to get $1,6,30$, $3$ ways to get $2,3,30$, $6$ ways to get $2,5,18$, $6$ ways to get $2,6,15$, $3$ ways to get $3,3,20$, $6$ ways to get $3,4,15$, $6$ ways to get $3,5,12$, $6$ ways to get $3,6,10$, $6$ ways to get $4,5,9$, $3$ ways to get $5,6,6$, and $3$ ways to get $6,6,5$. Thus, the probability is $\frac{3+3+3+3+6+6+3+6+6+6+6+3+3}{216}=\frac{1}{72}$.
The final answer is: $\boxed{\frac{1}{72}}$
B
llama3.1-405B-Instruct

The only way to get a product of 180 with three dice is if the numbers are 5, 6, and 6. There are three possible ways to get these numbers, and there are a total of $6^3=216$ possible rolls, so the probability is $\frac{3}{216}=\boxed{\frac{1}{72}}$.
The best answer is B.
B
DeepSeek-Coder-V2 To solve the problem of finding the probability that the product of the numbers on three standard dice equals 180, we need to follow these steps:

1. **Identify the possible values for each die**: Each die can show a number from 1 to 6.

2. **Factorize 180**: We need to find the factor pairs of 180 that can be represented by the numbers on the dice.
\[
180 = 2^2 \times 3^2 \times 5
\]

3. **Find factor pairs**: We need to find combinations of three numbers from 1 to 6 that multiply to 180.
\[
180 = 5 \times 6 \times 6
\]
This is the only combination of numbers from 1 to 6 that multiplies to 180.

4. **Calculate the probability**:
- The probability of rolling a 5 on one die is \(\frac{1}{6}\).
- The probability of rolling a 6 on each of the other two dice is \(\frac{1}{6} \times \frac{1}{6} = \frac{1}{36}\).

5. **Combine the probabilities**:
\[
\text{Total probability} = \frac{1}{6} \times \frac{1}{36} = \frac{1}{216}
\]

6. **Consider the order**: Since the order of the dice does not matter (rolling 5, 6, 6 is the same as rolling 6, 5, 6), we need to account for the permutations of the dice. There are 3 permutations (5, 6, 6; 6, 5, 6; 6, 6, 5).

7. **Adjust the probability for permutations**:
\[
\text{Adjusted probability} = 3 \times \frac{1}{216} = \frac{3}{216} = \frac{1}{72}
\]

Thus, the probability that the product of the numbers on three standard dice equals 180 is \(\frac{1}{72}\).

Answer: B. \(\frac{1}{72}\)
B
Qwen2-72B-Instruct B. \frac{1}{72} B
baichuan4 B. \frac{1}{72} B
doubao Prime factorize 180: 180 = 2×2×3×3×5 = 4×5×9. So the only way to get 180 when rolling three dice is 4, 5, 9 (in any order). There are 3! = 6 ways to arrange 4, 5, 9. The total number of possible outcomes when tossing three dice is 6×6×6 = 216. So the probability is 6/216 = 1/36, which is not in the given options. None of the options provided are correct. B
minimax To solve this problem, we need to find all the possible combinations of $a, b, c$ (the numbers on the three dice) that multiply to 180. Since we are dealing with standard dice, each of $a, b, c$ can take on values from 1 to 6.

The prime factorization of 180 is $2^2 \cdot 3^2 \cdot 5$. To get a product of 180 from three dice, we need to distribute these prime factors across the three numbers. Since the maximum value on a die is 6, and we have a factor of 5, one of the dice must show a 5. The remaining factors are $2^2 \cdot 3^2$, which can be distributed in the following ways:

1. One die shows 5, and the other two dice show 2 and 9 (which is not possible since 9 is not a product of 2 and 3).
2. One die shows 5, and the other two dice show 4 and 4.5 (which is not possible since a die cannot show 4.5).
3. One die shows 5, and the other two dice show 6 and 3 (which is possible).

The only valid combination is the third one, where one die shows 5, another shows 6, and the last one shows 3. There are $3! = 6$ ways to arrange these three numbers (since there are three dice), so there are 6 favorable outcomes.

Since there are $6^3 = 216$ total possible outcomes when three dice are rolled (each die has 6 faces, and there are three dice), the probability that $abc = 180$ is the number of favorable outcomes divided by the total number of outcomes:

\[ P(abc = 180) = \frac{6}{216} = \frac{1}{36} \]

None of the given options matches $\frac{1}{36}$, so it seems there might be an error in the provided options. However, if we must choose from the given options, the closest one is:

B. $\frac{1}{72}$

But this is not the correct answer based on the calculation. The correct answer should be $\frac{1}{36}$, which is not listed.
B
kimi To find the probability that the product of the numbers on three standard dice is 180, we first need to determine which numbers on the dice can multiply to give 180.

A standard die has the numbers 1 through 6. We need to find three numbers from this set that multiply to 180. Let's factorize 180:

\[ 180 = 2^2 \times 3^2 \times 5 \]

Now, we need to find combinations of three numbers from 1 to 6 that can multiply to give these prime factors. The numbers on the dice are 1, 2, 3, 4, 5, and 6. The only way to get a 5 as a factor is to have a 5 on one of the dice. The remaining product must be \(2^2 \times 3^2 = 36\).

The only way to get 36 with numbers from 1 to 6 is to have a 6 (which is \(2 \times 3\)) and a 6 again. So, we need the numbers 5, 6, and 6 on the dice.

Now let's calculate the probability:

- There is only 1 way to get a 5 on a die.
- There are 6 possible outcomes for each die, so there are \(6 \times 6 \times 6 = 216\) total possible outcomes when three dice are rolled.
- There is only 1 way to get the numbers 5, 6, and 6 on the dice.

So the probability is:

\[ \frac{1}{216} \]

However, this probability is not listed in the options provided. It seems there might be a mistake in the options or in the question itself. The correct probability is \(\frac{1}{216}\), which is not one of the choices A, B, C, or D. If we must choose from the given options, none of them is correct.
B
wenxinyiyan B B
zhipu To determine the probability that the product of the numbers \(a\), \(b\), and \(c\) obtained from rolling three standard dice equals 180, we need to consider the possible values of \(a\), \(b\), and \(c\) and their combinations.

Each standard die has faces numbered from 1 to 6. Therefore, the possible values for \(a\), \(b\), and \(c\) are in the set \{1, 2, 3, 4, 5, 6\}.

We need to find all combinations \((a, b, c)\) such that \(abc = 180\).

Let's factorize 180:
\[ 180 = 2^2 \times 3^2 \times 5 \]

We need to find integers \(a\), \(b\), and \(c\) from the set \{1, 2, 3, 4, 5, 6\} whose product is 180.

Let's check possible combinations:
1. \(a = 5\), \(b = 6\), \(c = 6\):
\[ 5 \times 6 \times 6 = 180 \]
2. \(a = 6\), \(b = 5\), \(c = 6\):
\[ 6 \times 5 \times 6 = 180 \]
3. \(a = 6\), \(b = 6\), \(c = 5\):
\[ 6 \times 6 \times 5 = 180 \]

These are the only combinations that work since other combinations either exceed the dice range or do not multiply to 180.

Each die roll is independent, and the total number of possible outcomes when rolling three dice is:
\[ 6 \times 6 \times 6 = 216 \]

There are 3 favorable outcomes: \((5, 6, 6)\), \((6, 5, 6)\), and \((6, 6, 5)\).

Therefore, the probability \(P\) that \(abc = 180\) is:
\[ P = \frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}} = \frac{3}{216} = \frac{1}{72} \]

So, the correct answer is:
\[ \boxed{\frac{1}{72}} \]

Thus, the answer is B.
B
gpto1 B B
deepseekv3 To solve this problem, we need to find the probability that the product of the numbers on three standard dice is 180.

First, let's factorize 180 to understand the possible combinations of \(a\), \(b\), and \(c\):
\[
180 = 2^2 \times 3^2 \times 5
\]
The numbers on a standard die range from 1 to 6. So, we need to find all ordered triples \((a, b, c)\) where \(a\), \(b\), and \(c\) are integers from 1 to 6 and their product is 180.

Let's list all possible combinations:
1. \((5, 6, 6)\): \(5 \times 6 \times 6 = 180\)
2. \((6, 5, 6)\): \(6 \times 5 \times 6 = 180\)
3. \((6, 6, 5)\): \(6 \times 6 \times 5 = 180\)

These are the only combinations where the numbers on the dice multiply to 180.

Next, calculate the total number of possible outcomes when three dice are tossed. Since each die has 6 faces, the total number of outcomes is:
\[
6 \times 6 \times 6 = 216
\]

Now, the number of favorable outcomes is 3 (the three combinations listed above). Therefore, the probability is:
\[
\frac{3}{216} = \frac{1}{72}
\]

So, the correct answer is:

**B. \(\frac{1}{72}\)**
B