Pete has ‘p’ number of balls. Number of balls with David is 3 times the balls with peter. Write this as an expression.

There are 5 different coloured balls and 5 boxes of the same colour as that of balls the number of ways that exactly two balls will go to its same coloured boxes is

A bag contains 6 white and 4 black balls. A fair die is rolled and a number of balls equal to that appearing on the die is chosen from the bag at random. The probability that all the balls selected are white is

A bag contains 6 white and 4 black balls.A fair die is rolled and a number of balls equal to that appearing on the die is chosen from the bag is random. The probability that all the balls selected are white is

A box contains 2 white balls, 3 black balls and 4 red balls. The number of ways can 3 balls be drawn from the box if atleast one black ball is to be included in the draw is

A box contains 2 white balls 3 black balls and 4 red balls . The number of ways in which there ballls can be drawn from the box so that at least one of the balls is black is

A bag contains 4 white balls, 6 red balls, 7 black balls and 3 blue balls. One ball is drawn at random from the bag. Find the probability that the ball drawn is red or white.

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