Asked by tanaya

David wants to rent a movie. He wants to watch either a comedy or a drama. The movie rental store has 18 comedies and dramas available for rent. Seven of the movies are comedies, and eleven of the movies are dramas. David has not seen two of the comedies, and he has not seen four of the dramas. If David selects a movie randomly, what is the probability the movie will be a comedy or a movie that he has not seen?
Answered by Reiny
He has not seen 5 of the comedies and 7 of the dramas
Since you want the non-seens from one OR the other
there are 12 movies he has not seen

prob(nonseen) = 12/18 = 2/3
Answered by Genesis
Formula: P(A or B)=P(A)+P(B)-P(A or B)

p(c)=7/18
p(s)=6/18
p(c or s)=2/18

0.39+0.33-0.11=
answer:0.61

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