There are `n` married couples at a party. Each person shakes hand with every person other than her or his spouse. Find the total no. of hand shakes.

If there are 12 persons in a party, and if each two of them shake hands with each other, how many handshake happen in the party?

In a room each person present shakes hand with the other . If the total number handshakes is 66 the number of persons present inn the room is

Everybody in a room shake hands with everybody else. If the total number of handshakes is 66, then the number of persons in the room is-

A person , giving two equal loans, one at a rate of simple interest of 8% per annum and the other at a rate of simple interst of 6% per annum, earns a total interest of Rs756 after a period of time of 18 months. Find the total amount of money he has given as loan.

How many ways are there to seat n married couples (ngeq3) around a table such that men and women alternate and each women is not adjacent to her husband.

Given four pair of gloves, they are distributed to four persons. Each person is given a right-handed and left-handed glove, then the probability that no person gets a pair is

A person feels no sensation when he puts his hand over flame, the part of the brain which has damaged is

Kanchan has 10 friends among whom two are married to each other. She wishes to invite five of them for a party. If the married couples refuse to attend separately, then the number of different ways in she can invite five friends is a. ""^8C_5 b. 2xx ""^8C_3 c. ""^10 C_5-2xx ""^8C_4 d. none of these