Three identical urns contain red and black balls The fist urn contains 2 white and 3 black balls, the second urn 3 white and 2 black balls and the third urn 1 black and 4 white balls. An urn is chosen at random and a ball is drawn from it.If the all drawn is white, what is the probability that the first um is chosen?

Three identical urns contain white and black balls. The first urn contains 2 white and 3 black balls, the second urn 3 white and 2 black balls and the third urn 1 black and 4 white balls. An urn is chosen at random and a ball is drawn from it. If the ball drawn is white, what is the probability that the first urn is chosen ?

Suppose that an, urn B_(1) contains 2 white and.3 black balls and another urn B_(2) contains 3 white and 4 black balls. One urn is selected at random and a ball is drawn from it: If the ball drawn is found black, find the probability that the urn chosen was B_(1).

Three identical Urns I,ll and III contain 4 white and 3 red balls,3 white and 7 red balls and 2 white and 3 red balls respectively.An Urn is chosen at random and a ball is drawn out of it at random.If the ball is found to be white,what is the probability that Urn ll was selected?

An urn contains 10 white and 3 black balls.Another urn contains 3 white and 5 black balls.Two balls are drawn from the first urn and put into the second urn and then a ball is drawn from the second urn and the probability that ball drawn from 2nd urn is white.