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11 November, 10:29

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?

a. 0.1298

b. 0.385

c. 0.12

d. 0.141

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  1. 11 November, 11:48
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    Total number of outcomes of 7 from 10 = 10*9*8 / 3*2*1 = 120

    probability of each outcoe is 0.85^7 * (0.15) ^ (3) = 0.0010819

    Required probability = 120 * 0.0010819 = 0.1298
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