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Six faces of a die are marked with numbe...

Six faces of a die are marked with numbers `1, -1, 0, -2, 2, 3` and the die is thrown thrice. The probability that the sum of the numbers thrown is six, is

A

`(1)/(72)`

B

`(1)/(12)`

C

`(5)/(108)`

D

`(1)/(36)`

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The correct Answer is:
To solve the problem, we need to calculate the probability that the sum of the numbers obtained by throwing a die marked with `1, -1, 0, -2, 2, 3` three times equals 6. ### Step-by-Step Solution: 1. **Identify the Outcomes**: The die has six faces with the following values: `1, -1, 0, -2, 2, 3`. 2. **Total Outcomes**: When the die is thrown three times, the total number of outcomes is given by: \[ \text{Total Outcomes} = 6 \times 6 \times 6 = 216 \] 3. **Find Favorable Outcomes**: We need to find combinations of three numbers from the die that sum to 6. We will consider different combinations: - **Combination 1**: \(1 + 2 + 3\) - The different arrangements of these numbers can be calculated using the factorial of the number of items: \[ \text{Ways} = 3! = 6 \] - **Combination 2**: \(0 + 3 + 3\) - Here, we have two 3's and one 0. The arrangements can be calculated as: \[ \text{Ways} = \frac{3!}{2!} = 3 \] - **Combination 3**: \(2 + 2 + 2\) - All numbers are the same, so there is only one way to arrange them: \[ \text{Ways} = 1 \] 4. **Total Favorable Outcomes**: Now, we sum the favorable outcomes from all combinations: \[ \text{Total Favorable Outcomes} = 6 + 3 + 1 = 10 \] 5. **Calculate Probability**: The probability \(P\) that the sum of the numbers thrown is 6 is given by the ratio of favorable outcomes to total outcomes: \[ P = \frac{\text{Total Favorable Outcomes}}{\text{Total Outcomes}} = \frac{10}{216} \] 6. **Simplify the Probability**: We can simplify \(\frac{10}{216}\): \[ \frac{10}{216} = \frac{5}{108} \] ### Final Answer: The probability that the sum of the numbers thrown is 6 is: \[ \frac{5}{108} \]

To solve the problem, we need to calculate the probability that the sum of the numbers obtained by throwing a die marked with `1, -1, 0, -2, 2, 3` three times equals 6. ### Step-by-Step Solution: 1. **Identify the Outcomes**: The die has six faces with the following values: `1, -1, 0, -2, 2, 3`. 2. **Total Outcomes**: When the die is thrown three times, the total number of outcomes is given by: \[ ...
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OBJECTIVE RD SHARMA ENGLISH-PROBABILITY -Section I - Solved Mcqs
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