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A bag contains 11 black and 21 gray marbles. A marble is drawn at random. What is the theoretical probability of NOT drawing a gray marble? P(Not gray) =
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1 vote
A bag contains 11 black and 21 gray marbles. A marble is drawn at random. What is the theoretical probability of NOT drawing a gray marble?

P(Not gray) =

User Toms Mikoss
by
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1 Answer

7 votes
P ( not gray)=11/32 ( not gray means black 11),
dividing (11+21=32 - altogether)
User Rokit
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