Sample of 3 items is selected at random from a box containing 20 items of which 4 aredefective. find the expected number of defective items in the sample.

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asked Jul 22, 2018 225k views

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Sample of 3 items is selected at random from a box containing 20 items of which 4 aredefective. find the expected number of defective items in the sample.

Mathematics
college

Mathias Vonende asked

by Mathias Vonende

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That's 54 I think. 20x3=60-4=54

Florin Bombeanu answered Jul 29, 2018

by Florin Bombeanu

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