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OpenStudy (anonymous):
A bag has 5 red marbles, 6 blue marbles and 4 black marbles. What is the probability of picking a black marble, replacing it, and then picking a black marble? A. 4/15 B. 8/75 C.16/225 D. 5/14
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OpenStudy (anonymous):
is it A.?
OpenStudy (anonymous):
the probability of picking a black marble is 4 out of 15 every time
OpenStudy (anonymous):
because there is always 15 marbles in the bag and 4 of them are always black
OpenStudy (anonymous):
goodjob!
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