In how many ways 4 different white balls and 6 different black balls be arranged in a row that no two white balls are together ?

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

In how many ways can 21 identical white balls and 19 identical black balls be arranged in a row so that no 2 black balls are together?

IN how mny ways can 18 white and 19 black balls be arranged in a row so that no two white balls may be together? It is given that balls ofteh same colour are identical.

IN how mny ways can 18 white and 19 black balls be arranged in a row so that no two white balls may be together? It is given that balls ofteh same colour are identical.

In how many ways can 7 red and 6 black balls be arranged in a row, if no two black balls are together?

In how many ways can 12 white and 8 black balls be arranged in a row if no two black balls are 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