A machine produces 0, 1 or 2 defective pieces in a day with associated – McqOptions

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1.	A machine produces 0, 1 or 2 defective pieces in a day with associated probability of 1/6, 2/3 and 1/6, respectively. The mean value and the variance of the number of defective pieces produced by the machine in a day, respectively, are
A.	1 and 1/3
B.	1/3 and 1
C.	1 and 4/3
D.	1/3 and 4/3
Answer» B. 1/3 and 1

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