Question

There are two girls Rina and Tina having n1, and n2 distinct numbers of toys respectively. The number of ways in which they can exchange their toys so that after exchanging they have the same number of toys with them but not the same toys, is

(a) (n1+n2)c(n1)

(b) ((n1+n2)c(n1))-1

(c) (n1+n2)p(n1)

(d) None of these​

Answer 1

Answer:

c is correct

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