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18 June, 18:44

A sample of 100 wood and 100 graphite tennis rackets are taken from the warehouse. If 6 wood and 14

graphite are defective and one racket is randomly selected from the sample, find the probability that the racket

is wood or defective ...?

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  1. 18 June, 22:14
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    Total 200 rackets ... P (A U B) = P (A) + P (B) - P (AnB) 100/200 + 20/200 - 6/200

    = 114/200
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