Answer
0.1
Work Step by Step
$p1=0.5, p2=0.4, p3=0.1, x1=0, x2=1, x3=2, n=5, n1=3, n2=1, n3=1$
$P=\frac{5!}{3!}0.5^30.4^10.1^1=0.1$
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