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

Please explain me,or give me a written solution as it is not available on Google
I will surely mark you as brainliest if anyone give me written solution or explain me..
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Answer 1

Answer:

b is the answer abcdefghijklmnopqrstuvwxyz