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1. There is 7 friends ( A1, A2, A3, …., A7). If A1 have to have shake with all without repeat. How many handshakes possible? a) 6 b) 21 c) 28 d) 7
Read Solution (Total 3)
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- a)6
If we consider only A1 handshake means, answer is 6.
A1 can shake hands with 6 people, A2-A7
If we consider all handshake a1-a7 means,
probability = 7c2
= 7*6/1*2
= 21 - 12 years agoHelpfull: Yes(6) No(1)
- Since only A1 with other.
Answer is definitely 6. - 12 years agoHelpfull: Yes(3) No(0)
- c
7*(7+1)/2=28 - 12 years agoHelpfull: Yes(0) No(9)
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