There are eight girls among whom two are sisters, all of them are to sit on a round table. Find the probability that the two sisters do not sit together.

n persons are seated on n chairs at a round table. Find the probability that two specified persons are sitting next to each other.

Five boys and four girls sit in a row randomly. The probability that no two girls sit together

Eight students are arranged in a row. Find the probability that two given students will be next to each other?

Three coins are tossed together. Find the probability of getting at most two heads.

Two cards are drawn from a well shuffled pack of cards find the probability that they are of different colour when they are selected together.

Two friends Aa n dB have equal number of daughters. There are three cinema tickets which are to be distributed among the daughters of Aa n dB . The probability that all the tickets go to the daughters of A is 1/20. Find the number of daughters each of them have.

In how many ways can 3 ladies and 3 gentlemen be seated around a round table so that any two and only two of the ladies sit together?

In how many ways can six students be seated in a line so that two particular students do not sit together?

There are two children in a family.One of them is a girl child .What is probability that the other one is also a girl child?

From a pack of 52 cards, two are drawn one by one without replacement. Find the probability that both of them are kings.