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13-01-2022
Mathematics

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The mean of nine numbers is 12 , if one of the numbers is removed ,

the mean becomes 13 , What is the number that was removed .

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mhanifa mhanifa

13-01-2022

Answer:

4

Step-by-step explanation:

Mean of 9 numbers is 12.

Total of 9 numbers:

9*12 = 108

Mean of 8 numbers is 13.

Total of 8 numbers:

8*13 = 104

Removed number:

108 - 104 = 4

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