A bag contains 3 black and 4 white balls. Two balls are drawn one by one at random without replacement. The probability that the second drawn ball is white, is

A bag contains 3 black and 4 white balls. Two balls are drawn one by one at random without replacement. The probability that the second drawn balI is white, is

A bag contains 5 red balls, 3 black balls and 4 white balls. 3 balls are drawn at random . The probability that they are not of same colour is

A bag contains 8 red balls and 5 white balls. Two successive draws of 3 balls are made without replacement. Find the probability that the first drawing will give 3 white balls and second drawing will give 3 red balls.

A bag contains 7 black and 4 red balls. If 3 balls are drawn at random, find the probability that one is black and two are red.