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A box contains 4 red, 3 white and 2 blue balls. Three balls are drawn at random. Find out the number of ways of selecting the balls of different colours?

62
48
12
24
Explanation:

1 red ball can be selected in 4C1 ways.

1 white ball can be selected in 3C1 ways.

1 blue ball can be selected in 2C1 ways.

Total number of ways

= 4C1 × 3C1 × 2C1

=4×3×2=24

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