A bag contains 10 red balls, 30 white balls, 20 black balls, and 15 yellow balls. If 2 balls are drawn, replacement being made after each drawing, find the probability that only one is red.
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Expert's answer
2020-03-03T10:04:37-0500
Solution. When drawing two balls, the red ball can be selected from both the first and second attempts. Therefore the probability is equal to
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