A machine produces 0, 1 or 2 defective pieces in a day with an associated probability of \(\frac{{1}}{{6}}\), \(\frac{{2}}{{3}}\) and \(\frac{{1}}{{6}}\) respectively. The mean value and the variance of the number of defective pieces produced by the machine in a day, respectively, are

\(\frac{{1}}{{3}}\) and \(\frac{{4}}{{3}}\)

A machine produces 0, 1 or 2 defective pieces in a day with an associa

1.	A machine produces 0, 1 or 2 defective pieces in a day with an associated probability of \(\frac{{1}}{{6}}\), \(\frac{{2}}{{3}}\) and \(\frac{{1}}{{6}}\) 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 \(\frac{{1}}{{3}}\)
B.	\(\frac{{1}}{{3}}\) and 1
C.	1 and \(\frac{{4}}{{3}}\)
D.	\(\frac{{1}}{{3}}\) and \(\frac{{4}}{{3}}\)
Answer» B. \(\frac{{1}}{{3}}\) and 1

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A machine produces 0, 1 or 2 defective pieces in a day with an associated probability of \(\frac{{1}}{{6}}\), \(\frac{{2}}{{3}}\) and \(\frac{{1}}{{6}}\) respectively. The mean value and the variance of the number of defective pieces produced by the machine in a day, respectively, are

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