Posted by Anonymous on Sunday, May 27, 2012 at 12:10pm.
If y blue marbles are removed and 30 orange marbles are added to the bag , the probability of getting a green marble become 1/4.Find the value y.

Math  MathMate, Sunday, May 27, 2012 at 3:56pm
Y can be anything, depending what was originally in the bag.
If there were originally 1 blue and 10 green marbles in the bag, y=1.
If there were originally 101 blue and 10 green marbles in the bag, y=101.
If there were originally 20 blue and 15 green marbles in the bag, y=5.
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