Find the number of ways in which 5 red balls, 4 black balls of different sizes can be arranged in a row so that
the balls of the same colour come together.

Find the number of ways in which 5 red balls, 4 black balls of different sizes can be arranged in a row so that no two balls of the same colour come together.

The number of ways in which 5 red balls , 4 black balls of different sizes can be arranged in a row so that no two balls of the same colour come together is

5 red balls and 4 black balls of different sizes are arranged in a row at random. The probability that no two balls of the same colour come together is

The number of ways in which 20 different white balls and 19 different black balls be arranged in a row,so that no two balls of the same colour come together is

3red and 4 white balls of different sizes are arranged in a row at random.The probability that no two balls of the same colour are together is

Find the number of ways by which 4 green, 3 red and 2 white balls can be arranged in a row such that no two balls of the same colour are together. All balls of the same colour are identical.

You are given 8 balls of different colour (black,white ......). The number of ways in which these balls can be arranged in a row so that the two balls of particular colour (say red and white) may never come together is-

You are given 8 balls of different colour (black,white ......). The number of ways in which these balls can be arranged in a row so that the two balls of particular colour (say red and white) may never come together is-