Multiple choice

The average of 5 numbers is 20. If one number 30 is added, new average = ?

  1. 65/3

  2. 22

  3. 23

  4. 24
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A Correct answer
Explanation

Sum of 5 numbers = 5 * 20 = 100. New sum after adding 30 = 100 + 30 = 130. New average = 130 / 6 = 65/3.

AI explanation

The sum of the original 5 numbers is 5 times 20, which is 100. Adding the number 30 brings the new sum to 130. Dividing this new sum by the new count of 6 numbers gives the new average of 65/3.

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