Question

Sebuah rak terdapat 4 novel, 3 buku tulis, 1 kamus, diambil secara acak 2 buku. berapa peluang terambil:
a. semua novel b. semua buku tulis

Answer 1

N(s) = 8c2 = 8! / (2!.6!) = 168
a) Semua Novel ----- n= 4
n(a) = 4c2 = 4! / (2!.2!) = 6
p(a) = 6/168 = 3/84 = 1/28

b) Semua buku tulis ----- n=3
n(a) = 3c2 = 3! / ( 2!.1!) = 3
p(a) = 3/168 = 1/56