Question

A batch of 40 semiconductor chips is inspected by choosing a sample of 3 chips. Assume...

A batch of 40 semiconductor chips is inspected by choosing a sample of 3 chips. Assume 10 of the chips do not conform to customer requirements. Round your answers to the nearest integer.

a. How many different samples are possible?
b. How many samples of 3 contain exactly one nonconforming chip?
c. How many samples of 3 contain at least one nonconforming chip?

please

Math   Statistics-And-Probability   
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