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Question: Answered & Verified by Expert
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
MathematicsPermutation CombinationJEE Main
Options:
  • A $64$
  • B $56$
  • C $49$
  • D $28$
Solution:
2088 Upvotes Verified Answer
The correct answer is: $28$
Total number of shake hands when each person shake hands with the other once only $=8 C_2 = 28$ ways.

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