Tolong dijawab soal matematika no 6 dan 7 kls 8 smp “PAKEK CARA”
no.6
Pembahasan
6. Jawabannya C.1/6
P(4) = n(4)/n(S)
P(4) = 5/(4+5+6+5+6+4)
P(4) = 5/30 = 1/6 (C)
7. Jawabannya B.20 kali
Rumus mencari peluang :
P(A) = n(A)/n(S)
A = angka dadu kurang dari 3
A = {1,2) ==> n(A) = 2
S= semua angka dadu
S = {1,2,3,4,5,6} ==> n(S) = 6
P(A) = 2/6 = 1/3
Frekuensi harapan :
Fh = n x P(A)
Fh = 60 x 1/3 = 20 kali (B)