Could someone help me with this answer.

pt: Find P(x) given that x = 4, q = 0.5, N = 9 (the * sign means multiply, the ! sign means a factorial, for example 5! = 5 * 4 * 3 * 2 * 1 = 120, and an exponent means multiply the number by itself that many times, for example 3⁴= 3 * 3 * 3 * 3 = 81)

P(x) = N! / [ x! * (N-x)! ] q^x* (1-q)^(N-x)