Aptitude - Average - Discussion
Discussion Forum : Average - General Questions (Q.No. 9)
9.
A car owner buys petrol at Rs.7.50, Rs. 8 and Rs. 8.50 per litre for three successive years. What approximately is the average cost per litre of petrol if he spends Rs. 4000 each year?
Answer: Option
Explanation:
| Total quantity of petrol consumed in 3 years |
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Total amount spent = Rs. (3 x 4000) = Rs. 12000.
 Average cost = Rs. |
 |
12000 x 51 |  |
= Rs. | 6120 | = Rs. 7.98 |
| 76700 | 767 |
Discussion:
92 comments Page 7 of 10.
Jeevan j said:
10 years ago
At most one minute is the time available for this question. So further simplifications is required.
Gameruler said:
10 years ago
How can we calculate this without using the calculator?
Abhishek said:
1 decade ago
Where 51 came from?
Gunwanti said:
1 decade ago
Can any one explain 76700/51?
Sathish said:
1 decade ago
Explain answers in short cut as much as possible.
Gaurav dudeja said:
1 decade ago
What is its short trick?
Ramsreeram said:
1 decade ago
Its simple because answer must be close to 7.98 or 8 here averages so it must be ratio form so 7.98.
Mounika said:
10 years ago
Answer: 1503.92.
Akash said:
1 decade ago
Look the in the option two closet answer can be 8 or 7.98.
So either can be true but 8 is not possible because of it is not linear so answer will be 7.98.
So either can be true but 8 is not possible because of it is not linear so answer will be 7.98.
Smiley said:
1 decade ago
Can anyone explain this 2/15+1/8+2/17 how it is?
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