Economics please help

Posted on 2013-11-21 16:12:00 in Economics by IZZY

fifteen castings of a certain type are produced per day in a foundary. the finished castings are inspected and classified either as defective or non-defective. records indicate that of the last 500 inspected 16 were defective. based on this information



a. probability of having no defective casting in a days production



b. probability of having at least 2 defective castings in a days production

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