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?

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?
QuestionThere 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?
Typemultiple_choice
Option420incorrect
Option210correct
Option378incorrect
Option231incorrect

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

ssc reasoning
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