The average of 6 numbers is 7. The average of three numbers of them is 5. What will be the average of remaining numbers?
A. 15 B. 30 C. 9 D. 42 Answer: Option CShow Answer
Solution(By Apex Team)
Average of 6 numbers = 7
Sum of 6 numbers = 6 × 7 = 42
Average of three numbers = 5
Sum of three numbers = 5 × 3 = 15
∴ Sum of the remaining three numbers
= 42 – 15 = 27
∴ Required average
$\begin{array}{l}
=\large\frac{27}{3} \\
=9
\end{array}$
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