Twelve persons meet in a room and each shakes hand with all others. Find the number oif hand shakes.

In a function there are 10 men and 8 women. Each man shakes his hand with all the men and each women shakes her hands with all the women. Find the total number of handshakes ?

Every person in a room , shake hands with every other person . The total number of handshakes it 45. The number of person in the room is .

15 friends meet at a marriage reception of their common friend. Every one of 15 friends shook hands with each other only once. Find the number of handshakes.

5 Indian & 5 American couples meet at a party& shake hands. If no wife shakes hands with her own husband & no Indian wife shakes hands with a male, then the number of hand shakes that takes place in an party

5 Indian and 5 American couples meet at a party & shake hands . If no wife shakes hands with her husband and no Indian wife shakes hands with a male, then the number of hand shakes that takes place in the party is

(i) If there are 12 persons in a party, and if each two of them shake hands with each other, how many handshakes happen ? (ii) In a student's reunion meeting in a school, 16 students show up. Each shakes hands with each other exactly once. Determine the total number of handshakes.

In a meeting between two countries, each country has 12 delegates. All the delegates of one country shake hands with all delegates of the other country. Find the number of handshakes possible.