- Home
- Standard 13
- Quantitative Aptitude
4.Average
medium
The average of $5$ quantities is $6 .$ The average of three of them is $8 .$ What is the average of remaining two quantities?
A
$2$
B
$5$
C
$9$
D
$7$
Solution
Let the average of remaining two quantities is $y$.
According to the question
$\frac{3 \times 4+2 \times y}{5}=6 \Rightarrow 12+2 y=30 \Rightarrow y=9$
Hence the average of remaining two quantities is $9.$
Standard 13
Quantitative Aptitude