engineering recuitment NIELIT Scientific Assistant Mock Test 2025 Engineering Mathematics Probability and Statistics Statistical Variables
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
1
1 and \(\frac{{1}}{{3}}\)
2
\(\frac{{1}}{{3}}\) and 1
3
1 and \(\frac{{4}}{{3}}\)
4
\(\frac{{1}}{{3}}\) and \(\frac{{4}}{{3}}\)