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Mathematics, 05.06.2021 14:00 suehailey

3. One ball is selected at random from a bag containing 12 balls of which x are white.
(a) What is the probability of selecting a white ball?
When a further 6 white balls are added the probability of selecting a
white ball is doubled.
(b) Find x.​

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3. One ball is selected at random from a bag containing 12 balls of which x are white.
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