### A man purchased 7 bags of rice at the rate of Rs. 800 each, 8 bags of rice at Rs. 1000 each and 5 bags of rice at the rate of Rs. 1200 each. What is the average cost of one bag of rice ?

A. Rs. 1000 B. Rs. 980 C. Rs. 1120 D. Rs. 1050 Answer: Option B

### Solution(By Apex Team)

$\begin{array}{l}\text{According to the question,}\\ \text{Average}\\ =\Large\frac{7 \times 800+8 \times 1000+5 \times 1200}{20} \\ =\Large\frac{5600+8000+6000}{20} \\ =\Large\frac{19600}{20} \\ \therefore \text { Average }=\text { Rs. } 980 \end{array}$

A. 20
B. 21
C. 28
D. 32

A. 18
B. 20
C. 24
D. 30

A. 10 years
B. 10.5 years
C. 11 years
D. 12 years