Aptitude questions – Averages – Set 1

Q.1) Average cost of 4 ruled and 2 unruled notebooks  is Rs.38. Average cost of  7 ruled and 8 un ruled note books is Rs.52, and Average cost of 5 ruled and 6 unruled notes is Rs.45. Find the total cost of 8 ruled and 8 un ruled note books.

a) Rs.815.5

b) Rs.751.5

c) Rs.715.5

d) Rs.810.5

e) None of these

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Q.2) Sumith ate 70 dates in 1week. Each day he ate 2 more dates than those he ate on the earlier day. What is the average number of dates did he eat on the first, fourth and last day?

a) 13

b) 15

c) 10

d) 9

e) 11

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Q.3) In a class room 410 cake pieces are distributed among some girls and boys. Total number of girls is 30. Each girl gets four pieces and each boy gets five pieces. Find the average number of boys and girls in the class room?

a) 58

b) 41

c) 52

d) 44

e) None of these

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Q.4) The total salary paid to the 25 assembly workers is Rs. 237500. The foreman’s salary is 110% of the average salary of assembly workers salary. How much salary is paid to  the Foreman?

a) Rs.13100

b) Rs.12350

c) Rs. 11900

d) Rs. 10450

e) None of these

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Q.5) In an R&D department, the average monthly salary of 21 Mentors and 5 TLs in a Govt exam coaching institute was Rs.4500. When one TL’s salary was Rs.11000 was replaced with a new TL, then the average salary of the department went down to Rs.4450. what is the salary of new TL?

a) Rs.9700

b) Rs.8500

c) Rs.10500

d) Rs.9000

e) Cannot be determined

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Q.6) Renuka went to shop and buy a chocolate pocket. Renuka thought the chocolate pocket contain more than 90 chocolates but less than 100 chocolates. Her friend Ravi thought the chocolate pocket contained more than 85 chocolates but less than 95 chocolates and another friend Ramya saw a chocolate pocket and said it  cannot be more than 93 chocolates. If all are them are correct in their estimate, what is the average of different probable number of chocolate in the pocket?

a) 93

b) 91

c) 92

d) 89

e) 90

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Q.7) The average monthly salary of four persons are A, B, C and D is Rs. 12000. If their salary are in the ratio of A to B is 2 : 5, B to C is 5 : 1 and C to D  is 1 : 4, then what is average salary of B and D?

a) Rs.16000

b) Rs.17500

c) Rs.18000

d) Rs. 19000

e) 21000

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Q.8) The sum of cube of two positive numbers is 728 and difference between their cubes is 296. Find the average of two numbers?

a) 6

b) 7

c) 14

d) 19

e) 11

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Q.9) The average weight of W, X and Y is 46 kg. If Z  replaced W. The average would be 52 kg and if Z replaced X, the average would be 56 kg, If Z  replaced Y, the average would be 48 kg. What is average weight of W, Y and Z?

a) 60 kg

b) 52 kg

c) 48 kg

d) 56 kg

e) None of these

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Q.10) The average weight of 19 boxes of apple is 11.5 kg, a box is added increasing the average  weight by 400 g. What is the weight of new box?

a) 20.5 kg

b) 19.5 kg

c) 21 kg

d) 18.4 kg

e) None of these

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