###
**The average of five numbers is 7. When three new numbers are included, the average of the eight numbers becomes 8.5. The average of the three new numbers is :**

A. 9
B. 10.5
C. 11
D. 11.5
**Answer: Option C**

## Show Answer

Solution(By Apex Team)

Sum of 5 numbers = 7 × 5 = 35
Sum of 8 numbers = 8.5 × 8 = 68
Sum of added all three numbers = 68 – 35 = 33
Average of three new numbers
$\begin{array}{l}=\Large\frac{33}{3}\\
=11\end{array}$

## Related Questions On Average

### Ajit has a certain average for 9 innings. In the tenth innings, he scores 100 runs thereby increasing his average19 people went to a hotel for combine dinner party 13 by 8 runs. His new average is:

A. 20B. 21

C. 28

D. 32

### Find the average of all the numbers between 6 and 34 which are divisible by 5.

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C. 24

D. 30

### In a family, the average age of a father and a mother is 35 years. The average age of the father, mother and their only son is 27 years. What is the age of the son?

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### If the arithmetic mean of 0, 5, 4, 3 is a, that of -1, 0, 1, 5, 4, 3 is b and that of 5, 4, 3 is c, then the relation between a, b, and c is.

A. a = b = cB. a : b : c = 3 : 2 : 4

C. 4a = 5b = c

D. a + b + c = 12