p = 90% dan q = 1 – 90% = 10% untuk x = 3 dan n = 5 maka P(X = 3) = b(3; 5; 90%) = C (90%) .(10%) 5-3 = C (90%) .(10%) 2 3 3 5 3 5 3 untuk y = 5 – 3 = 2 dan n = 5 maka P(Y = 2) = b(2; 5; 10%) = 0,0729