In a conference of 8 persons, if each person shake hand with other one only, then total number of sh

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6.Permutation and Combination

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In a conference of $8$ persons, if each person shake hand with the other one only, then the total number of shake hands shall be

A

$64$

B

$56$

C

$49$

D

$28$

Solution

(d) Total number of shake hands when each person shake hands with the other once only = $^8{C_2} = 28$ ways.

Standard 11

Mathematics

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