Multiple choice

The average of 40 numbers is 35. If two numbers (25 and 45) are not included, what will be the average of the remaining numbers?

  1. 37.5

  2. 37

  3. 36

  4. 35

  5. 34
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D Correct answer
Explanation

Initial sum = 40 * 35 = 1400. New sum = 1400 - 25 - 45 = 1330. New count = 38. New average = 1330 / 38 = 35.

AI explanation

The total sum of all 40 numbers is 40 * 35 = 1400. When the numbers 25 and 45, which sum to 70, are excluded, the sum of the remaining 38 numbers becomes 1400 - 70 = 1330. The average of these remaining numbers is their sum divided by 38, resulting in 1330 / 38 = 35.

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