A pot has 2 white, 6 black, 4 grey and 8 green balls. If one ball is picked randomly from the pot, what is the probabili…

A bag contains 10 mangoes out of which 4 are rotten, two mangoes are taken out together. If one of them is found to be g…

Two dice are thrown simultaneously. What is the probability of getting the sum of the face number is at most 5?

Four dice are thrown simultaneously. Find the probability that all of them show the same face.

A bag contains 7 green and 5 black balls. Three balls are drawn one after the other. The probability of all three balls …

The variance of binomial distribution is always

Suresh keeps all his socks in a single drawer. He has 24 pairs of white socks and 18 pairs of grey socks. Suresh picks 3…

In a race, the odd favour of cars P, Q, R, S are 1 : 3, 1 : 4, 1 : 5 and 1 : 6 respectively. Find the probability that o…