help me please I have a 48 in math

Question

A shipment of

11

printers contains

3

that are defective. Find the probability that a sample of size

3​,

drawn from the

11​,

will not contain a defective printer.

Answer 1

combinations of 0 out of 3 defectives * combinations of 3 out of 8 non-defectives

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combinations of 3 samples out of 11

1 * 8!/(5!3!) = 56

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11!/(3!8!) 165