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  • The mean and variance of a binomial distribution are 4 an...
Multiple choice

The mean and variance of a binomial distribution are 4 and 2 respectively. Find the probability of 2 successes.

  1. 37/256

  2. 219/256

  3. 128/256

  4. 28/256

  5. None

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct; np =4 npq = 2, q =p = 1/2 and n = 8. Hence, the answer is 8C2(0.5)^8.

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