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 exactly once.

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 at least once.

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 at least twice?

In a raffle 200 tickets are sold. Reena buys one ticket. What is the probability that she won first prize?

In a lottery, there are 35 tickets in all, 10 bearing prize numbers and 25 are blanks. A lady draws 2 tickets at random. What is the probability that she will win no prize?

In a certain lottery 10,000 tickets are sold and ten equal prizes are awarded. What is the probability of not getting a prize if you buy : one ticket .