Question

The average of a set of $10$ numbers is $15$. If one number is removed the average of the remaining numbers is $16$. What is the value of the number removed?

• A. $4$
• B. $5$
• C. $6$
• D. $7$

Answer 1

The correct option is C $6$

Average of a set of $10$ numbers is $15$

$\therefore$ Total $=15\times 10=150$

If one number is removed than average of $9$ number is $16$.

$\therefore$ Total $=9\times 16=144$

Then the number removed $=150-144=6$