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 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 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 6 red and 5 blue balls. One ball is drawn at random. The probability that the ball is blue is:

A bag contains 2 red,3 green & 2blue balls. Two balls are drawn at random.What is the probablity that none of the balls drawn is blue?

An urn contains 5 red and 5 black balls. A ball is drawn at random, its colour is noted and is returned to the urn. Moreover, 2 additional balls of the colour drawn are put in the urn and then a ball is drawn at random. What is the probability that the second ball is red?

An urn contains 5 red and 5 black balls. A ball is drawn at random, its colour is noted and is returned to the urn. Moreover, 2 additional balls of the colour drawn are put in the urn and then a ball is drawn at random. What is the probability that the second ball is red?