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A box contains 30 widgets, 4 of which are defective. If 4 are sold at...

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A box contains 30 widgets, 4 of which are defective. If 4 are sold at random, find theprobability that (a) all are defective (b) none are defective.A)1/30;2/15B)1/657720;1/164430C)2/15;13/15D)1/27405;2990/5481

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