Suppose that the probability a seed will germinate is 85%. What is the probability that 7 of these seeds will germinate when 10 are planted?

Use the binomial probability for exactly 7 germinating seeds: choose which 7 of the 10 germinate, then multiply by the probabilities of 7 successes and 3 failures. This gives C(10,7)(0.85)^7(0.15)^3 ≈ 0.1298, so the best answer is 0.1298.

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