Question

The mean number of tails in three tosses of a fair coin is:

• A. 3/2
• B. 1/6
• C. 3
• D. 6

Answer 1

The correct option is A

3/2

Here, n = 3 and p(tail) = p(head) = ½

So, n = 3 and p = ½, then mean number of tails = np = 3(1/2) = 3/2