Ticket numbered 1 to 20 are mixed up and then a ticket is drawn at random .What is the probability that the ticket drawn has a number which is a multiple of 3 or 5 ?
A bag contains 20 coloured balls.8 are red,6 are blue,3 are green,2 are white and 1 is brown.A ball is chosen atrandom from the bag.What is the probability that the ball chosen is blue or red?
Three unbiased coins are tossed. What is the probability of getting at most two heads ?
Nine playing cards are numbered 2 to 10 .A card is selected from them at random. probability that the card will be a multiple of 4 is
If A and B are two independent events then the value of P(A/B ) is
The probability that a leap year will contain 53 Sundays is
Total probability of an event =
If two coins are tossed once. What is the probability of getting at least one head?
One card is drawn at random from a pack of 52 cards .What is the probability that the cards drawn is a face card (Jack, Queen , and king only ?
There are four letters and four envelopes ,then the probability for all the letters not despatching in the right envelope is