In a drawer there are 5 black socks and 3 green socks. Two socks are picked randomly one after the other without replace…

In which distribution successive trials are without replacement

Find the probability that getting 4 digit number with 1 in the unit place and 2 in the tens place when the numbers 1, 2,…

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

A bag contains 6 white and 4 black balls. Two balls are drawn at random. Find the probability that they are of same colo…

Binomial distribution has parameters

The probability of a lottery ticket being a prized ticket is 0.2. When 4 tickets are purchased, the probability of winni…

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