Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Probability Baye's Theorem
The chances of a defective screw in three boxes A, B, C are \(\frac{1}{5},{\rm{\;}}\frac{1}{6}\) and \(\frac{1}{7}\) respectively. A box is selected at random and a screw drawn from it at random is found to be defective. Find the probability that it came from box A.
1
\(\frac{{40}}{{107}}\)
2
\(\frac{{41}}{{107}}\)
3
\(\frac{{42}}{{107}}\)
4
More than one of the above
5
None of the above