Question 1206560
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(a)  P(3) is the complement of the sum P(0) + P(1) + P(2) + P(4) + P(5).

     So, calculate P =  P(0) + P(1) + P(2) + P(4) + P(5) using given data.

     then find P(3) = 1 - P.



(b)  P(at least 4 DVDs) = P(4) + P(5).  Calculate using given data.


(c)  P(at most 2 DVDs) = P(0) + P(1) + P(2).  Calculate using given data.
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Happy calculations !