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4.  Suppose that a machine produces defective item with probability 0,1. a) When we select 5 items, find the probability of 1 item being defective. b) If the amount of daily production is 100, then what's the expected defective item amount? c)What’s the variance of defective items of samples around the expected defective items.

5.  The probability of making a successful surgery for the doctos is %80.  If that doctor make 3 surgeries in one month, find the probabilities for all possible results.

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8.  Suppose that in production line for every 20 products, 4 of them are required to be reprocessed. a) If we select 2 products, find the probability of one of them being reprocessed. b) If we selected 10 products, how many of them should have been expected to enter reprocessing.

9.  E(X)=Var(X)=

10.  Suppose that, in İzmir the number of power blackout events has the Poisson distribution with mean 2, for one year. a)Find the probability that there will be no power blackout in following year? b)Find the probability that there will be 2 power blackout in next 6 months? c)Find the probability that there will be 2 or more blackout events in following year?

15.  In a production line, it was found that 200 out of 1000 items were found defective. a)What’s the probability that the first defective item is observed while testing the 4th item? b)How many items should have been tested until the first defective item found? c)What’s the probability of the first defective item is not the first tested one?

17.  Suppose that there are 3 different brands; A,B and C. And we have observed the be purchase probabilities as follows; P(A)=0,40 P(B)=0,10 P(C)=0,50 Suppose that there are 10 customers, what’s the probability that 2 of them buys A, 5 of them buys B and 3 of them buys C.