Jawabanmu

2014-05-14T19:06:47+07:00
N(S) = 10C4 =     10!         = 10x9x8x7x6! = 210
                         4!(10-4)!      4x3x2x1x6!
n(K) = 9
P(K) = n(K) = 9/210 = 2/70
           n(S)