12 members were present at a board meeting. Each member shook hands with a

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Question

12 members were present at a board meeting. Each member
shook hands with all of the other members before & after the
meeting. 

How many hand shakes were there?

Question Submitted By :: Guest

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Answer Posted By

Re: 12 members were present at a board meeting. Each member shook hands with all of the other members before & after the meeting. How many hand shakes were there?

Answer
# 1

132

Think of it this way: the first person shakes hands with 11
people, the second person also shakes hands with 11 people,
but you only count 10, because the hand shake with the first
person was already counted. Then add 9 for the third person,
8 for the fourth, & so on.

66 hand shakes took place before & 66 after the meeting, for
a total of 132.

Is This Answer Correct ?

34 Yes

4 No

Guest

Re: 12 members were present at a board meeting. Each member shook hands with all of the other members before & after the meeting. How many hand shakes were there?

Answer
# 2

For n nuimber of persons shaking hands with each other,
total no of handshakes are n(n-1)/2.
Hence for 12 people itis 12(12-1)/2= 66
Thus total handshakes = 2*66=132

Is This Answer Correct ?

27 Yes

2 No

Ajay Maurya

Re: 12 members were present at a board meeting. Each member shook hands with all of the other members before & after the meeting. How many hand shakes were there?

Answer
# 3

132.........

thank u

Is This Answer Correct ?

10 Yes

1 No

Vignesh1988i

Re: 12 members were present at a board meeting. Each member shook hands with all of the other members before & after the meeting. How many hand shakes were there?

Answer
# 4

For n nuimber of persons shaking hands with each other,
total no of handshakes are n(n-1)/2.
Hence for 12 people itis 12(12-1)/2= 66
Thus total handshakes = 2*66=132

Is This Answer Correct ?

13 Yes

0 No

Raj

Re: 12 members were present at a board meeting. Each member shook hands with all of the other members before & after the meeting. How many hand shakes were there?

Answer
# 5

For n nuimber of persons shaking hands with each other,
total no of handshakes are n(n-1)
Thus total handshakes =12(12-1)=132

Is This Answer Correct ?

3 Yes

1 No

Saurabh Sukhija

Question	Asked @	Answers
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