Question

A n B play 12 games of chess of which 6 are won by A ,4 are won by B n 2 matches end in a draw. They agree to play a tournament of 3. What is the probability dat B wins atleast 1 game.

Answer 1

Probability of B wins at least 1 is-
Total no. of possible outcomes=12
There are 4 matches won by B
No. of favourable outcomes=4
Probability= No. of favourable outcomes
Total no. of possible outcomes
P=4/12 = 1/3