The number of ways of selecting 10 balls...

The number of ways of selecting 10 balls from unlimited number of red, black, white and green balls, is

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Find the number of ways of selecting 10 balls out of an unlimited number of identical white, red, and blue balls.

The number of ways of selecting 9 balls from 6 red balls, 5 white balls and 5 blue balls, if each selection consists of 3 balls of each colour. Assuming that balls of the same colour are distinguishable is (i) 40 (ii) 60 (iii) 180 (iv) 2000

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Find the total number of selections of at least one red ball from 4 red balls and 3 green balls, if (a) the balls of the same colour are different, (b) the balls of the same colour are identical.

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