If there are 10 candidate materials that can be used for manufacturing a certain machine and the probability that each one leads to a machine that lasts at least 10 years is 0.8, what is the probability that exactly 7 of the machines will last at least 10 years?
Let the number of machines:
Given
The probability that exactly 7 of the machines will last at least 10 years is 0.2013.
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