a bag contains 10 blue balls 30 red balls. a ball is drawn from the bag its colour is recorded and is put back in the bag.this process is repeated three times . the probability that no two of the balls drawn have same co;our
a bag contains 10 blue balls 30 red balls. a ball is drawn from the bag its colour is recorded and is put back in the bag.this process is repeated three times . the probability that no two of the balls drawn have same co;our










