A bag contains 6 white marbles and 5 red marbles. Find the number of ways in which four marbles can be drawn form the bag if
2 must be white and 2 red.

A bag contains 6 white marbles and 5 red marbles. Find the number of ways in which four marbles can be drawn form the bag if they must all be the same colour.

A bag contains 6 white marbles and 5 red marbles. Find the number of ways in which four marbles can be drawn form the bag if they can be of any colour.

A bag contains 5 black and 6 red balls. Determine the number of ways in which 2 black and 3 red balls can be selected.

A bag contains 10 white, 6 black and 4 red balls. Find the probability of getting : a white ball

A bag contains 10 white, 6 black and 4 red balls. Find the probability of getting : not a red ball

A bag contains 10 white, 6 black and 4 red balls. Find the probability of getting : a black ball

A box contains 10 red marbles, 20 blue marbles and 30 green marbles. 5 marbles are drawn from the box, what is the probability that all will be blue

The contents of three bags A, B and C are as follows: Bag A: 1 white, 2 black and 3 red balls, Bag B: 2 white, 1 black and 1 red balls. Bag C: 4 white, 5 black and 3 red balls. A bag is selected at random. Two balls are drawn from the selected bag. if these found to be white and red, find the probability that they have been drawn from bag A.

The contents of three bags A, B and C are as follows: Bag A: 1 white, 2 black and 3 red balls, Bag B: 2 white, 1 black and 1 red balls. Bag C: 4 white, 5 black and 3 red balls. A bag is selected at random. Two balls are drawn from the selected bag. if these found to be white and red, find the probability that they have been drawn from bag B.

Bag I contains 4 red and 6 white balls and bag Il contains 3 red and 7 white balls. One of the bags is selected at random and a ball is drawn from it. The ball is found to be white. Find the probability that ball is drawn from bag I.