There are 7 black balls and 9 red balls in an urn. If 3 balls are...

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There are 7 black balls and 9 red balls in an urn. If 3 balls are...

There are 7 black balls and 9 red balls in an urn. If 3 balls are drawn without replacement, what is the probability that exactly 1 black ball is drawn? Express your answer as a fraction or a decimal number rounded to four decimal places.

math Statistics-And-Probability

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Answer 1

Answer #1

probability that exactly 1 black ball is drawn =P(1 black ball from 7 black ball and 2 red from 9 red balls)

=⁷C₁*⁹C₂/¹⁶C₃ =7*36/560 =63/140 =0.4500

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Answer 2

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