Question: Suppose that A and B each randomly and independently choose 3 of 10 objects. Find the expected number of objects (a) Chosen by both A

Suppose that A and B each randomly and independently choose 3 of 10 objects. Find the expected number of objects
(a) Chosen by both A and B;
(b) Not chosen by either A or B;
(c) Chosen by exactly one of A and B.

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