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Jawab2) A = (0,1,2,3,...,9)
n(A) = 10
bilngan ats 4 angka dan anghka selalu di awal
= 1 x 8 x 7 x 5
= 280
3).
p= 10
l= 8
Luas arsir = (10 x 8) - 1/2 [(4x5) + (6x3) + (8x5) +(2x3)]
L = 80 - 1/2 (84)
L = 80 - 42
L = 38