Multiple choice

Out of $10$ white, $9$ black and $7$ red balls, the number of ways in which selection of one or more balls can be made, is:

  1. $881$
  2. $891$
  3. $879$
  4. $892$
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C Correct answer
Explanation

The number of ways to select one or more balls from 10 white, 9 black, and 7 red balls is (10+1)(9+1)(7+1) - 1. This is 11 * 10 * 8 - 1 = 880 - 1 = 879.

AI explanation

The total number of ways to select one or more balls from 10 white, 9 black, and 7 red balls is found by multiplying the possible selections for each color and subtracting one for the empty selection. This gives the formula (10+1)(9+1)(7+1) - 1. Calculating this yields 11 x 10 x 8 - 1 = 880 - 1 = 879.

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