Kaidah Pencacahan
Kombinasi nCr = n ! / { (n - r)! . r ! }
*
n = 10
r = 5
a) A harus masuk
n = 10 - 1 = 9
r= 5 - 1 = 4
banyak cara 9C4 = 126
b) A tidak boleh masuk
r = 5- 1 = 4
Banyak caa = 9C4 = 126
Banyak cara 8C3 = 56
c) A masuk dan B tidak
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Kaidah Pencacahan
Kombinasi nCr = n ! / { (n - r)! . r ! }
*
n = 10
r = 5
*
a) A harus masuk
n = 10 - 1 = 9
r= 5 - 1 = 4
banyak cara 9C4 = 126
*
b) A tidak boleh masuk
n = 10 - 1 = 9
r = 5- 1 = 4
Banyak caa = 9C4 = 126
Banyak cara 8C3 = 56
*
c) A masuk dan B tidak
n = 10 - 1 = 9
r = 5- 1 = 4
Banyak caa = 9C4 = 126