jawaban terlampir
Penjelasan dengan langkah-langkah:
JAWABAN TERLAMPIR
beri bintang lima yaa, trims :)
n = 20 orang
r = 6 orang
A]
m = 2 orang (mengundurkan diri)
(n-m) K (r)
= (20-2) K (6)
= (18) K (6)
= 18!/(18-6)!6!
= 18!/12!6!
= (18×17×16×15×14×13×12!)/12!(6×5×4×3×2×1)
= (18×17×16×15×14×13)/(6×5×4×3×2×1)
= 13366080/720
= 18564 cara
B]
a = 5 orang (pasti diterima)
(n-a) K (r-a)
= (20-5) K (6-5)
= (15) K (1)
= 15!/(15-1)!(1!)
= 15!/14!1!
= (15×14!)/14!(1)
= 15/1
= 15 cara
C]
a = 2 orang (jelas diterima)
m = 4 orang (mengundurkan diri
(n-a-m) K (r-a)
= (20-2-4) K (6-2)
= (14) K (4)
= 14!/(14-4)!4!
= 14!/10!4!
= (14×13×12×11×10!)/10!(4×3×2×1)
= (14×13×12×11)/(4×3×2×1)
= 24024/24
= 1001 cara
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jawaban terlampir
Penjelasan dengan langkah-langkah:
JAWABAN TERLAMPIR
beri bintang lima yaa, trims :)
n = 20 orang
r = 6 orang
A]
m = 2 orang (mengundurkan diri)
(n-m) K (r)
= (20-2) K (6)
= (18) K (6)
= 18!/(18-6)!6!
= 18!/12!6!
= (18×17×16×15×14×13×12!)/12!(6×5×4×3×2×1)
= (18×17×16×15×14×13)/(6×5×4×3×2×1)
= 13366080/720
= 18564 cara
B]
a = 5 orang (pasti diterima)
(n-a) K (r-a)
= (20-5) K (6-5)
= (15) K (1)
= 15!/(15-1)!(1!)
= 15!/14!1!
= (15×14!)/14!(1)
= 15/1
= 15 cara
C]
a = 2 orang (jelas diterima)
m = 4 orang (mengundurkan diri
(n-a-m) K (r-a)
= (20-2-4) K (6-2)
= (14) K (4)
= 14!/(14-4)!4!
= 14!/10!4!
= (14×13×12×11×10!)/10!(4×3×2×1)
= (14×13×12×11)/(4×3×2×1)
= 24024/24
= 1001 cara