Pankaj earns 5/3 times in March, May, July, and December than his average earning of ₹9000 per month in the rest of the months. So his savings in the March, May, July, and December goes to 7/4 times than that of the rest month’s savings of ₹2000 per month in the year. What is his average expenditure per month?

Earning in the remaining 8 months = 7000 × 8 = ₹56000 Earning in March, May, July, December (4 months) = (7000 × 8/5) × 4 = ₹44800 ⇒ Total earnings (12 months) = 56000 + 44800 = ₹100800 Savings in the remaining 8 months = 4000 × 8 = ₹32000 Savings in March, May, July, and December (4 months) = (4000 × 5/2) × 4 = ₹40000 ⇒ Total savings (12 months) = 32000 + 40000 = ₹72000 ∴ Total expenditure (12 months) = 100800 - 72000 = ₹28800 ⇒ Average expenditure per month = 28800/12 = ₹2400

- In an examination, the average marks obtained by the students is 40. After correcting the quantitative mistakes, the average of 60 students is reduced to 25 from 40 and the overall average of the student is reduced to 30. Then find the total number of students who participated in that examination.
- If the average marks of the three batches 32, 45 and 54 student respectively is 50, 42 and 35, then find the approximate average mark of all the students?
- The average age of 13 girls is 40 years. If the age of one more girl is added the average decreases by half a year. What is the age of new girl?
- The average weight of 8 persons is increased by 2.5 kg, when a person whose weight is 56 kg, is replaced by a new comer. Find the weight of new comer?
- The average of n numbers is 62. If each of 55% of the numbers is increased by 18 and each of the remaining numbers is decreased by 12, then the new average of the numbers will be
- The average score of a class of boys and girls in examination is X. The ratio of boys and girls in the class is 4:3. If the average score of the boys (X + 2), the average score of the girls is:
- The average expenditure of a man for the first five month is Rs.14000 and for the next seven months is Rs.12000. If he saves 17000 in that year then find his average monthly income.
- Average of 16 observations calculated by a student was 65 but when he again went through his observations he realised that he took value of three observations as 50, 59 and 40 in place of 90, 52 and 77 respectively and also realised that total observations taken by him was 15. Find the original average of all observations taken by him.
- The average age of A and B is 17 years. If A is to be replaced by C, the average would be 16 years. The average age of C and A is 18 years. Find the age of A.
- A number is such that when it is multiplied by 6, it gives another number which is as much above from 210 as the original number (itself) is below 210. The average of the original number and the resultant number is:

More Average Questions

×

×