SOLUTION: A bag contains 8 white, 4 red, 7 green, and 5 blue marbels. Eight marbles are withdrawn at random. How many of the withdrawn marbles are white if the chance of drawing a white marb

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Question 382672: A bag contains 8 white, 4 red, 7 green, and 5 blue marbels. Eight marbles are withdrawn at random. How many of the withdrawn marbles are white if the chance of drawing a white marble is now 1 in 4?
Answer by kingme18(98) About Me  (Show Source):
You can put this solution on YOUR website!
We are starting with 8+4+7+5=24 marbles. We're taking out 8, so we'll be left with 24-8=16 marbles. Think about those 16. If the probability of drawing a white one is 1 in 4, that means that 1/4 of the marbles are white. 1/4 of 16 is 16/4 = 4 marbles are white. Since we started with 8 white, and there are 4 left, we must have taken out 8-4 = 4 white marbles.