math

A jar contained 50 marbles. Of the 50 marbles, 90% of them were red and the remainder were green. Some of the red marbles were removed from the jar and after this, 75% of the marbles in the jar were red. How many red marbles were removed from the jar?

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  2. 👎 0
  3. 👁 34
  1. so there were 45 reds.
    If x were removed, then
    (45-x)/(50-x) = 3/4
    ...

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    posted by oobleck

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