RRB NTPC Prelims Model Paper 3 with solutions

Question : 79 of 100

Marks: +1, -0

At the end of a party, the ten people present all shake hands with each other once. How many handshakes will be there altogether ?

Solution:

(3) Total number of handshakes

={10(10- 1)}/2

{={10 ×9}/2= 45}

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