Processing math: 100%


Probability AIME Basic
2014


Problem - 84
An urn contains 4 green balls and 6 blue balls. A second urn contains 16 green balls and N blue balls. A single ball is drawn at random from each urn. The probability that both balls are of the same color is 0.58. Find N.

Solving 44+6×1616+N+64+6×N16+N=58100

gives answer N=144.

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