There are n socks in a drawer, of which 3 socks are red. If 2 of the socks are chosen randomly and the probability tha both selected socks are red is ` (1)/(2)`, then what is the value of n?

In a drawer there are four white socks, three blue socks and five grey socks. Two socks are picked at random. What is the probability that both the socks are of same colour?

There are two red, two blue, two white, and certain number (greater than 0) of green socks n a drawer. If two socks are taken at random from the drawer4 without replacement, the probability that they are of the same color is 1/5, then the number of green socks are ________.

There are two red,two blue,two white,and certain number (greater than 0) of green socks in a drawer.If two socks are taken at random from the drawer without replacement,the probability that they are of the same color is 1/5, then the number of green socks are

There are two red, two blue, two white, and certain number (greater than 0) of green socks in a drawer. If two socks are taken at random from the drawer without replacement, the probability that they are of the same color is 1//5 , then the number of green socks are _______.

There are two red, two blue, two white, and certain number (greater than 0 ) of green socks in a drawer. If two socks are taken at random from the drawer 4 without replacement, the probability that they are of the same color is 1/5 , then the number of green socks are ________.

There are two red, two blue, two white, and certain number (greater than 0) of green socks in a drawer. If two socks are taken at random from the drawer without replacement, the probability that they are of the same color is 1/5, then the number of green socks are ________.

A drawer contains red and black balls. When two balls are drawn at random, the probability that they both are red is (1)/(2) . The number of balls in the drawer can be

An almirah stores 5 black and 4 white socks well mixed. A boy pulls out 2 socks at random. The probability that 2 are of the same colour is