This is multiple choice but please explain 1 Find Px given t

This is multiple choice, but please explain.

1. Find P(x) given that x = 4, q = 0.5, N = 9

(a) 0.4922

(b) 0.3225

(c) 0.1222

(d) 0.5631

Solution

ANSWER WILL BE GIVEN BY THIS FORMULA P(x) = N! / [ x! * (N-x)! ] q^X * (1-q)^ (N-x) * 2

= (9!/4!*5!)(0.5^4)(0.5^5) *2

= 0.4922