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21-08-2019
Mathematics

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A bag contains x blue chips and y red chips. If the probability of selecting a red chip at random is 3/7, then x/y.

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21-08-2019

Let P = probability given

P = red/(red + blue)

3/7 = 3/(3 + blue)

This means that blue must be 4 to get a sum of 7.

Answer: 4/3

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