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12 friends met at a party. Each friend shook hands with each other exactly once. Number of handshakes took place is _____.
  • a)
    66
  • b)
    50
  • c)
    45
  • d)
    40
Correct answer is option 'A'. Can you explain this answer?

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Answers

Riya Singh
Mar 18, 2021
Related 12 friends met at a party. Each friend shook hands with each other exactly once. Number of handshakes took place is _____.a)66b)50c)45d)40Correct answer is option 'A'. Can you explain this answer?
The first person shook hands with 11 remaining people, the second person also shook hands with 11 people, but we count 10, as the hand shake with the first person has already been counted.
Then add 9 for the third person, 8 for the fourth one & proceeding in this fashion
We get: 11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 66.

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12 friends met at a party. Each friend shook hands with each other exactly once. Number of handshakes took place is _____.a)66b)50c)45d)40Correct answer is option 'A'. Can you explain this answer? for Class 4 2022 is part of Class 4 preparation. The Question and answers have been prepared according to the Class 4 exam syllabus. Information about 12 friends met at a party. Each friend shook hands with each other exactly once. Number of handshakes took place is _____.a)66b)50c)45d)40Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 4 2022 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 12 friends met at a party. Each friend shook hands with each other exactly once. Number of handshakes took place is _____.a)66b)50c)45d)40Correct answer is option 'A'. Can you explain this answer?.
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The first person shook hands with 11 remaining people, the second person also shook hands with 11 people, but we count 10, as the hand shake with the first person has already been counted.Then add 9 for the third person, 8 for the fourth one & proceeding in this fashionWe get: 11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 66.