NCERT Exercise 13.2 Q13 - Probability
Question: Two balls are drawn at random with replacement from a box containing 10 black and 8 red balls. Find the probability that (i) both are red (ii) first black and second red (iii) one of each colour.
Answer: (i) 16/81; (ii) 20/81; (iii) 40/81.
Full step-by-step NCERT solution with diagrams on Something by Zero.