A contractor purchases a shipment of 100 transistors. It

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QUESTION:

A contractor purchases a shipment of 100 transistors. It is his policy to test 10 of these transistors and to keep the shipment only if at least 9 of the 10 are in working condition. If the shipment contains 20 defective transistors, what is the probability it will be kept?

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QUESTION:

A contractor purchases a shipment of 100 transistors. It is his policy to test 10 of these transistors and to keep the shipment only if at least 9 of the 10 are in working condition. If the shipment contains 20 defective transistors, what is the probability it will be kept?

ANSWER:

Step 1 of 2

Given:

Working transistors

Defective transistors

Let  be the number of working transistors.

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