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A pharmacist receives a shipment of 21 bottles of a drug and has 4 of the bottles tested If 5 of the 21 bottles are

A pharmacist receives a shipment of 21 bottles of a drug and has 4 of the bottles tested If 5 of the 21 bottles are contaminated what is the probability that at least 3 of the tested bottles are contaminated Express your answer as a fraction or a decimal number rounded to four decimal places

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