The average of 10 numbers is 7. If each number is multiplied by 12, then the average of the new set of numbers will be :

The average of 10 numbers is 7. If each number is multiplied by 12, then the average of the new set of numbers will be :
[A]19
[B]84
[C]82
[D]7

84
If each number is multiplied by a certain number, then the average is also multiplied by that number.
∴ Required average $= 7\times 12 = 84$
Hence option [B] is the right answer.