Latest TCS Aptitude Question SOLUTION: 10 people are there , they are shaking hand together. how many handshakes are possible if they are in no pair of cyclic sequence?

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10 people are there , they are shaking hand together. how many handshakes are possible if they are in no pair of cyclic sequence?

Asked In TCS anilchaudhary (11 years ago)

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himanshu umrao  (11 years ago)

its answer is 9

Is this solution Helpfull? Yes (8) | No (7)  

Susanta Kar  (11 years ago)

its answer is 9.
not 10C2
as when we select the 2 people out of 10.their are cyclic sequences.
e.g.if we assume x,y,z are 3 people among 10 people.
then if we select the 2 people out of them it will xy,yz,zx.
their are a cyclic sequence.
so without no pair of cyclic sequence result is (10-1)= 9

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Abhishek gupta  (11 years ago)

(10*9)/2=45

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Abhishek gupta  (11 years ago)

10C2=45
we select the 2 people out of 10.
that is the Number of handshake.

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PARAG KAMRA  (11 years ago)

9+8+7+6+5+4+3+2+1=45 ways(ans)

Is this solution Helpfull? Yes (2) | No (5)  

PARAG KAMRA  (11 years ago)

when n is even and said that it is to be cyclic order, do n/2

when n is odd and said that it is to be cyclic order, do n/3

when n is odd or even but system in not cyclic , do n-1

so here n = 10(even),but system is not cyclic

ans will be = (n-1) = 10-1 = 9 (ans)

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lala  (11 years ago)

10c2 = 10*9/2 = 45

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shyamjee kumar  (11 years ago)

(n-1) handshakes.
so answer is 10-1=9.

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yuvasri  (11 years ago)

ans 10
hint : cyclic mean no reapetaion
therefore n=10

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NILOY SUTRADHAR  (11 years ago)

in a non cycle sequence there must be 10-1=9 handshakes are possible

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Aashima Arora  (11 years ago)

People , 9 handshakes happen when its given when One person has to shake hands without repeating. here there is no such condition. so 10c2 = 45 is the ans !!!!

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