There are `12` pairs of shoes in a box. Then the possible number of ways of picking `7` shoes so that there are exactly two pairs of shoes are

There are 8 pairs of shoes in a cupboard. Find the number of ways of selecting 4 shoes so that there is no pair ?

Number of ways of selecting 6 shoes,out of 8 pairs of shoes,having exactly two pairs is

There are 20 pairs of shoes in a closet. Out of them 4 shoes are selected at random. The probability that there is exactly one pair among the 4 shoes is

There are 20 pairs of shoes in a closet. Four shoes are selected at random. The probability that there is exactly one pair is

A box contains 5 pairs of shoes. If 4 shoes are selected, then the number of ways in which exactly one pair of shoes obtained is

There are 20 pairs of shoes in a cupboard. Ten shoes are taken at random. The probability that exactly three complete pairs are possible from the selected shoes is

There are 20 pairs of shoes in a cupboard. Ten shoes are taken at random. The probability that exactly three complete pairs are possible from the selected shoes is

There are 10 pairs of shoes in a cup board from which 4 shoes are picked at random. The probability that there is atleast one pair is

There are 5 pairs of shoes in a cupboard from which 4 shoes are picked at random. The probability that there is at least one pair is