In a binomial distribution the occurrence and the non-occurrence of an event are equally likely and the mean is 6 . The number of trials required is

Step-by-step solution

In Binomial distribution, if p is the probability of certain event to happen and q is the probability of its failure in a single trial then p+q=1 . Here given p=q (As both events are equally likely) so, p= 1 2 Now, mean =( Number of trials ) p aligned & & 6 & =n 1 2 aligned or, n=12