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A box has 5 blue and 4 red balls.One balls is drawn at random and not replaced.Its colour is also not noted.Then another ball is drawn at random.What is the probability of second ball being blue?

A box has 5 blue and 4 red balls. One ball is drawn at random and replaced. Its colour is also not noted. Then, another ball is drawn at random. What is the probability of second ball being blue?

A box has 5 blue and 4 red balls. One ball is drawn at random and not replaced. Its colour is also not noted. Then, another ball is drawn at random. What is the probability of second ball being blue ?

A box has 5 blue and 4 red balls. One ball is drawn at random and not replaced. Its colour is also not noted. Then, another ball is drawn at random. What is the probability of second ball being blue?

A box has 5 blue and 4 red balls. One ball is drawn at random and replaced. Its colour is also not noted. Then, another ball is drawn at random. What is the probability of second ball being blue?

A box has 5 blue and 4 red balls. One balls is drawn at random and not replaced. Its colour is also not noted. Then another ball is drawn at random. What is the probability of second ball being blue?

A box has 5 blue and 4 red balls. One ball is drawn and not replaced. It colour is also not noted. Another ball is then drawn at random. What is the probability of second ball being blue.

A box contains 3 red and 7 white balls. One ball is drawn at random and in it placed a ball of the other colour is placed in the box. Now if one ball is drawn at random from the box then the probability that it is a red ball is

A bag contains 4 what and 6 black balls. A ball is drawn at random and replaced and then again a ball is drawn. If this is replaced 4 times, what is the probability that three black and one white ball will be drawn in these 4 trials ?

A bag contains 5 white and 7 red balls.One ball is drawn at random.What is the probability that ball drawn is white?