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5. 2.5-9. Suppose there are three defective items in a lot (collection) of 50 items. A sample of size ten is taken at random and without replacement. Let X denote the num ber of defective items in the sample. Find the probability that the sample contains (a) Exactly one defective item. (b) At most one defective item. (1666. Teacher msagnia handinn toum2 ! Student T teamt