Average to ten number is 7 . If every number is multiplied

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Average to ten number is 7 . If every number is multiplied by 12, What will be the average of new numbers ?

1. 7
2. 9
3. 82
4. 84

Correct Option: D

Here initial average = 7
As we know that, if all the numbers are multiple by a certain number, then their average must be a multiple of that number.
∴ New average = 7 x 12 = 84