Question

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. 

(i) at least once 

(ii) exactly once 

(iii) at least twice

Answer 1

P(probability of winning each ticket)

= 1/100

and p(probability of lossing each ticket)

= 1 - 1/100 = 99/100

(i) P(Probability of winning at least once)

= 1 - (99/100)50

(ii) Probability of winning exactly once