Question 576586: Sue-Lin hit three out of five pitches during batting practice. To simulate her chances of making a hit, she puts 50 marbles in a box. A red marble represents a hit, and a blue marble represents a miss. After a marble is drawn, it is replaced.
this is the question:
how many red marbles does Sue-Lin need in the box?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Sue-Lin hit three out of five pitches during batting practice. To simulate her chances of making a hit, she puts 50 marbles in a box. A red marble represents a hit, and a blue marble represents a miss. After a marble is drawn, it is replaced.
this is the question:
how many red marbles does Sue-Lin need in the box?
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Ratio of red to blue = 3:5
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Equation:
3x+5x = 50
8x = 50
x = 25/4
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# of red = 3x = 3(25/4) = 75/4 = 19 when rounded up
# of blue = 5x = 5(25/4) = 31
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Cheers,
Stan H.
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