Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Business Statistics and Research Methods Probability Bayes’ theorem
Envelope I contains 2 black and 3 red sheets. while envelope II contains 3 black and 4 red sheets. Out of these two envelopes, one is selected at random and the probability of choosing envelope I is double that of envelope II. If a red sheet is drawn from the selected envelope, then the probability that it has come from envelope II is:
1
\(\frac{11}{31}\)
2
\(\frac{13}{31}\)
3
\(\frac{15}{31}\)
4
\(\frac{10}{31}\)