A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that at…

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket draw…

On rolling a dice 2 times, the sum of 2 numbers that appear on the uppermost face is 8. What is the probability that the…

Two dice are thrown simultaneously. What is the probability of getting the sum of the face number is odd?

Two dice are thrown simultaneously. What is the probability of getting two numbers whose product is even ?

A special lottery is to be held to select a student who will live in the only deluxe room in a hostel. There are 100 Yea…

Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is-

A five-digit number is formed by using digits 1, 2, 3, 4 and 5 without repetition. What is the probability that the numb…