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Quantitative Aptitude

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In a room, ev...

Question

In a room, everybody shakes hand with everybody else. If there are $15$ people in the room. How many handshakes can be expected?

A

105

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B

115

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C

120

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D

135

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Solution

The correct option is A $105$
As everybody shakes hand with everybody . Total number of handshakes $=^{15} C_{2} = 105$

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