Question

Using binomial distribution find the mean and variance of X for the following experiments 

(i) A fair coin is tossed 100 times, and X denote the number of heads. 

(ii) A fair die is tossed 240 times, and X denote the number of times that four appeared.

Answer 1

(i) n = 100, ‘X’ denotes the number of heads.

(ii) n = 240, ‘X’ denotes the number of times four appeared.