Question

What is the mean value for a binomial experiment with 45 repetitions and a probability of success of 0.25? 

Answer 1

If a count X has the binomial distribution with the number of trials $n$ and the probability of success $p$ , the mean of X is:

$\mu _x=np$

\mu \:\:_x=45\times 0.25

\mu \:_x=11.25

Therefore, the mean value is $11.25$ .