There are 28 persons present at a press conference. After the conference they all shake hands with each other. If 7 of them refuse to shake hands at all, then how many handshakes will be there altogether?

June 24, 2023

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Question	There are 28 persons present at a press conference. After the conference they all shake hands with each other. If 7 of them refuse to shake hands at all, then how many handshakes will be there altogether?
Type	multiple_choice
Option	420	incorrect
Option	210	correct
Option	378	incorrect
Option	231	incorrect

Solution : 21 persons shake hands with each other Required total hand shake =

In the following question, four number pairs are given. In each pair the number on left side of (–) is related to the number of the right