SOLUTION: A bag contains 24 red balls and some blue balls . When a blue ball is picked at random the probability that it is a blue ball is 4/7. How many blue balls are there?
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Question 1109372: A bag contains 24 red balls and some blue balls . When a blue ball is picked at random the probability that it is a blue ball is 4/7. How many blue balls are there? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A bag contains 24 red balls and some blue balls . When a blue ball is picked at random the probability that it is a blue ball is 4/7. How many blue balls are there?
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Equation:
# of red :: 24
# of blue :: b
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Total # of balls (24+b)
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Equation:
b/(24+b) = 4/7
7b = 96+4b
3b = 96
b = 32 (# of blue balls)
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Cheers,
Stan H.
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