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Subject :IMO    Class : Class 4

There were 5 pupils in a room. Each pupil shook hands once with each of the other pupils. How many handshakes took place ?

(a) 5
(b) 10
(c) 15
(d) 20


a

Ans 1:

Class : Class 4
is it not 20... that is the option D??

Ans 2:

Class : Class 4

Ans 3:

Class : Class 4
b

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