Mathematics, 20.09.2020 06:01 victo17

A box contains 8 white balls, 7 black balls & 2 red balls. a) how many red balls must be added to the box so that the probability of drawing a red ball is 8/9?
b) how many black balls must be added to the original box so that the probability of drawing a white ball is 1/9?

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A box contains 8 white balls, 7 black balls & 2 red balls. a) how many red balls must be added...

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A box contains 8 white balls, 7 black balls & 2 red balls. a) how many red balls must be added to the box so that the probability of drawing a red ball is 8/9? b) how many black balls must be added to the original box so that the probability of drawing a white ball is 1/9?

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Another question on Mathematics

A box contains 8 white balls, 7 black balls & 2 red balls. a) how many red balls must be added to the box so that the probability of drawing a red ball is 8/9?
b) how many black balls must be added to the original box so that the probability of drawing a white ball is 1/9?