Averages

Q. A shopkeeper sold 64 kettles of two different capacities. The smaller kettle costs a rupee less than the larger one. The shop made 100 rupees from the sale of large kettles and 36 rupees from the sale of small ones. How many kettles of either capacity did the shop sell and what was the price of each kettle?

1. 20 kettles for 2.5 rupees each and 14 kettles for 1.5 rupees each
   
2. 40 kettles for 4.5 rupees each and 24 kettles for 2.5 rupees each
   
3. Either a or b
4. 40 kettles for 2.5 rupees each and 24 kettles for 1.5 rupees each
   

Q. The average expenditure of Sarvesh from January to June is Rs. 4200 and he spent Rs. 1200 in January and Rs. 1500 in July. The average expenditure for the months of February to July is :

1. 4250
2. 4520
3. 4060
4. None of these

Q. Find the average increase rate. If the increase in the population in the first year is 30% and that in the second year is 40%.

1. 41
2. 38
3. 56
4. 40

Q. Out of the five integral numbers C is the average of A and D. B is greater than C and less than D. Also B is the average of A and E. The middle most number in the sequence is :

1. B
2. C
3. A
4. D

Q. Praveen gets 40 marks out of 50 in Computer Science. 70 out of 100 in Manufacturing science and 142 out of 150 in proffessional communication. The average marks of Praveen (In percent) in all the three subjects is :

1. 84%
2. 76%
3. 71%
4. 60%

Q. Siddhartha has earned an average of 4200 dollars for the first eleven months of the year. If he justifies his staying in the US on the basis of his ability to earn at least 5000 dollars per month for the entire year, how much should he earn (in dollars) in the last month to achieve his required average for the whole year?

1. 14, 600
2. 5, 800
3. 12, 800
4. 13, 800

Q. In 1919, W. Rhodes, the Yorkshire cricketer, scored 891 runs for his country at an average of 34.27; in 1920, he scored 949 runs at an average of 28.75; in 1921, 1329 runs at an average of 42.87 and in 1922, 1101 runs at an average of 36.70. What was his batting average for the four years?

1. 36.23
2. 28.72
3. 37.81
4. 35.58

Q. There are 500 seats in Minerva Cinema, Mumbai, placed in similar rows. After the reconstruction of the hall, the total number of seats became 10% less. The number of rows was reduced by 5 but each row contained 5 seats more than before. How many rows and how many seats in a row were there initially in the hall?

1. 20 rows and 25 seats
2. 10 rows and 50 seats
3. 50 rows and 10 seats
4. 20 rows and 20 seats

Q. The total age of all the guests in the party was 540 years. If a South Indian couple (guests) left the party, then the average of the remaining guests still remained unchanged, where the age of both the husband and wife (the South Indian couple) was same, then the average age of this couple and the total number of guests in the party, respectively, can be :

1. 18, 27
2. 20, 27
3. 15, 38
4. Can't be determined

Q. There are 6 consecutive odd natural numbers in increasing order. The difference between the average of the squares of the first 4 numbers and the last four numbers is 64. If the sum of the squares of the first and the last element (i. e , odd numbers) is 178, then the average of all the six numbers is :

1. 7
2. 10
3. 8
4. 9