Question

The mean of $121$ numbers is $59$. If each number is multiplied by $4$. What will be the new mean.

• A. $236$
• B. $240$
• C. $248$
• D. $232$

Answer 1

The correct option is A $236$

Given the mean of $121$ numbers is $59$.

Then sum of the numbers is $121\times 59$.

Now if we multiply each numbers by $4$ then the sum of the numbers $=4\times 121\times 59$.

Then mean of the new numbers will be

$=\frac{4\times 121\times 59}{59}$

$=4\times 59$

$=236$.