A and B play a series of games which cannot be drawn and p, q are their respective chances of winning a single game. What is the chance that A wins m games before B wins n games?

A and B throw a die alternatively: till one of them gets a 6 and wins the game. Find their respective probabilities of winning, If A starts first:

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

A and B toss on alternately till one of them tosses heads and wins the game, their respective probabilities of winning are : a) 1/4 and 3/4 b) 1/2 and 1/2 c) 2/3 and 1/3 d) 1/5 and 4/5

A person buys a lottery ticket in 50 lotteries in each of which his chance of winning prize is 1/100 what is the probability that he will win a prize at least twice.

A person buys a lottery ticket in 50 lotteries ,in each of which his chance of winning prize is 1/100 .What is the probability that he will win a prize exactly once.

Two persons A and B throw a die alternately till one of them gets a 3 and wins the game, the respectively probabilities of wining , if A begins are :

In a lottery, a' person choses six different natural numbers at random from 1 to 20, and if these six numbers match with the six numbers already fixed by' the lottery committè, he wins the prize. What is the próbability of winning the prize in the game?