The secretary made an entry of the arrangement.

An arrangement is selected at random from all the arrangements made from the letters of word CONSCIOUS taken all at a time. The probability that the selected arrangement has the string "COCO"

In how many ways can 12 members be seated at a round table when the secretary and the joint secretary are always the neighbours of the president.

If a secretary and a joint secretary are to be selected from a committee of 11 members, then in how many ways can they be selected ?

If a secretary and a joint secretary are to be selected from a committee of 11 members, then in how many ways can they be selected

The first Secretary-General of the United Nations was