Question

A die is thrown 100 times.Getting an even number is considered as a success ,the variance of number of success is

Answer 1

Let p be the probability of success.

Out of 6 numbers on the die, three are favourable. Those are 2,4,6

P=3/6=1/2

q=1/2

n=100

Variance =npq=100*1/2*1/2=25