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A person buys a lottery ticket in 50 lot...

A person buys a lottery ticket in 50 lotteries, in each of which his chance of winning a prize is `(1)/(100)`. What is the probability that he will win a prize (a) at least once (b) exactly once (c) at least twice?

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The correct Answer is:
(a) `1-((99)/(100))^(50)` (b) `(1)/(2)((99)/(100))^(49)` (c) `1-(149)/(100)((99)/(100))^(49)`
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