dclingonst dclingonst

29-03-2018
Mathematics

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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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mkryukova19 mkryukova19

29-03-2018

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

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