Answer:
Let
is the number of wins, then x has the nonimial distribution with n = 50, p =
(a)
P(atleast once)
=
1 ? P(x<1) = 1 ? P(x = 0)
(b)
P (exactly once) = P (x = 1)
(c)
P (atleast twice) = P(x 2)
= 1 ? P(x < 2)
=
1 ? [P (x = 0) + P (x = 1)]
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