SOLUTION: A box contains fewer than 50 marbles. Each marble is either red or white. The probability of randomly choosing a red marble is 2/5. What is the largest number of white marbles that

Question 252107: A box contains fewer than 50 marbles. Each marble is either red or white. The probability of randomly choosing a red marble is 2/5. What is the largest number of white marbles that could be in the box?
A 18 b 27 c 31 d 45 e 49
Answer by vksarvepalli(154) (Show Source): You can put this solution on YOUR website!
ans:27
since the prob. of choosing a red marble is 2/5.
if there are are 20 red marbles then there should be 50 marbles overall.
but they should be less than 50
so if there are 19 red then there should be 47.5(for 2/5 prob) marbles which is not possible as it is not an whole number
so if there are 18 marbles then there will be 45 marbles overall and the no of white marbles will be 27 which is the maximum possible.
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