The average of ten numbers is 7 If each number is…

Are you looking for correct answer of The average of ten numbers is 7 If each number is…? Here we have shared detailed answer with explanations.

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

  1. A. 7
  2. B. 19
  3. C. 82
  4. D. 84

Answer: Option D

Here is complete explanation of The average of ten numbers is 7 If each number is….

Solution(By ExamCraze Team)

Average of 10 numbers = 7
Sum of these 10 numbers = (10 × 7) = 70
$$eqalign{ & therefore {x_1} + {x_2} + ..... + {x_{10}} = 70 cr & Rightarrow 12{x_1} + 12{x_2} + ..... + 12{x_{10}} = 840 cr & Rightarrow frac{{12{x_1} + 12{x_2} + ..... + 12{x_{10}}}}{{10}} = 84 cr} $$
⇒ Average of new numbers is 84

Leave a Comment