Probability of occurance, A person purchases a package of

Probability of occurance

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Reference no: EM13102028

A person purchases a package of 10 ball-point pens which, unknown to the purchaser, contains 4 defective pens. Of the first 2 pens used by the purchaser, find the probability that at least 1 pen is defective._____________

Reference no: EM13102028

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