In a party of 30 people eah shakes hands with the others, Number of hand shakes took place in the party is

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

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 & 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

There are 15 persons in a party and if each 2 of then shakes hands with each other , how many handshakes happen in the party ?

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

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?

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?

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?

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