Never mind, I figured it out. Yeah me!
I know that the mean is equal to np, where n is the number of trials and p is the success. But how do I find the mean if I only the value of n and the value of P(x)? For example, n = 2, P(x) = 0.9, 0.07 & 0.03. This is really bugging me that I can't figure out how to do this!