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16-10-2021
Mathematics

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In a shipment of 20 smartphones, 2 are defective. How many ways can a quality control inspector randomly test 4 smartphones, of which 2 are defective?

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16-10-2021

Answer:

The quality control inspector can add 4 randomly selected smartphones from the rest of 20-2 = 18 smartphones.

And 816 ways

Step-by-step explanation:

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