A box contains 4 red balls,5 green balls and 6 white balls.A ball is drawn at random.Find the probability that the ball drawn is either red or green?
Total=15C1=15
No of events=4C1+5C1=9
Probability=9/15=3/5
An unbiased die is thrown.Find the probability of getting a multiple of 3
In a throw of a coin,find the probability of getting a head.
A bag contains 7 white and 9 black balls.Two balls are drawn in succession at random.What is the probability that one of them is white and the other black?
A bag contains 2 red,3 green and 2 blue balls,two balls are drawn at random.What is the probability that none of the drawn balls are blue?
A bag contains 6 white and 4 red balls.Three balls are drawn at random.What is the probability that one ball is red and other two are white?