In a class of $22$ students, every student had a handshake with every other student. The total number of handshakes were

150

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200

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250

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231

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Solution

The correct option is C $231$
Number of handshakes $=^{22} C_{2} = 11 \times 21 = 231$

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In a class of 22 students, every student had a handshake with every other student. The total number of handshakes were

The correct option is C 231Number of handshakes =22C2=11×21=231

In a class of $22$ students, every student had a handshake with every other student. The total number of handshakes were

The correct option is C $231$
Number of handshakes $=^{22} C_{2} = 11 \times 21 = 231$