You are given 6 balls of different colours (black, white, red, green, violet, yellow), in how amny ways can you arrange them in a row so that black and white balls may never come together?

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

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-

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

In how many ways can 7 green and 5 yellowballs be arranged in a striaght line when 2 yellow balls are not together?

In how many ways can 3 red and 4 black balls be arranged in a row?

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 ?

In how many ways can 5 red and 4 white balls be drawn from a bag containing 10 red and 8 white balls

There are 2 identical white balls, 3 identical red balls, and 4 green balls of different shades. Find the number of ways in which they can be arranged in a row so that atleast one ball is separated from the balls of the same color.

The number of ways of arranging m white and n black balls in a row (mgtn) so that no two black are placed together, is

The number of ways in which 4 different red balls and 8 similar green balls can be arranged in a row so that at most 3 red balls are together is equal to