If two dice are rolled 12 times and getting a total greater than 4 is considered as a success, then which of the following statements are correct?
(A) The probability of getting a total greater than 4 in a single throw of the pair of dice is 5/6.
(B) Mean = 10
(C) Variance = 3/5
(D) The probability of getting a total less than or equal to 4 in a single throw of the pair of dice is 1/6.
Choose the correct answer from the options given below:
If two dice are rolled 12 times and getting a total greater than 4 is considered as a success, then which of the following statements are correct?
(A) The probability of getting a total greater than 4 in a single throw of the pair of dice is 5/6.
(B) Mean = 10
(C) Variance = 3/5
(D) The probability of getting a total less than or equal to 4 in a single throw of the pair of dice is 1/6.
Choose the correct answer from the options given below:
Solution
When rolling two dice together, success is defined as getting a total greater than 4.
The outcomes where total ≤ 4 are:
Total of 2: (1,1) → 1 way
Total of 3: (1,2), (2,1) → 2 ways
Total of 4: (1,3), (2,2), (3,1) → 3 ways
Total ways to get ≤ 4 = 1 + 2 + 3 = 6 ways
Total possible outcomes when rolling two dice = 6 × 6 = 36
Statement D is correct.
Statement A is correct.
The experiment follows a Binomial Distribution with:
(number of trials)
(probability of success)
(probability of failure)
Mean =
Mean =
Mean =
Statement B is correct.
Variance =
Variance =
Variance =
Variance =
Statement C claims variance = , which is incorrect since .
Statements (A), (B), and (D) are correct.
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