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3 years ago

10

There are 12 marbles in a bag, and the marbles are either yellow or green ]. Two marbles will be randomly picked from the bag, w

ithout replacing the first one picked. The probability that both marbles will be yellow 5/33. How many GREEN marbles are in the bag?

1 answer:

dimaraw [331]3 years ago

6 0

7 cause you subtract 5 so the rest are green which is 7 are green

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$\frac{3-a}{6} -\frac{6-a}{3} =a+1; 
\\ \\ \frac{3-a}{6} -\frac{2(6-a)}{3*2} =a+1
\\ \\ \frac{3-a-12+2a}{6} =a+1
\\ \\ 6*\frac{a-9}{6} = 6*(a+1)
\\ \\ a-9 = 6a+6
\\ \\ 5a= -15
\\ \\ a=-3$

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