NCERT Exercise 13.3 Q3 - Probability
Question: Of college students, 60% reside in hostel and 40% are day scholars. 30% of hostellers and 20% of day scholars get A grade. A randomly chosen student has an A grade. Find the probability that the student is a hosteller.
Answer: 9/13.
Full step-by-step NCERT solution with diagrams on Something by Zero.