Aptitude questions – Averages – Set 2

Q.1) In a examination the average marks obtained by a student is 73 per paper. If he had obtained 31 marks more in economy paper & 17 more marks in Computer paper, then his average per paper is increased by 4 marks. Then how many papers were there in examination?

a) 12

b) 14

c) 15

d) 11

e) None of these

Q.2) The average rainfall for the first five days out of seven days was recorded to be 5.5 cm. The rainfall on last two days is 5.4 cm and x cm. The average of seven days was 5.6 cm. What is the value come in the place of x?

a) 6.66 cm

b) 9.6 cm

c) 6.3 cm

d) 5.5cm

e) None of these

Q.3) In a famous hotel the rooms were numbered from 101 to 140, each room gives an earning of Rs.3500 for the first fifteen days of a month and for the latter half, Rs.4000 per room. Find the average income per room per day over the month of 31 days? (Approximately)

a) Rs.3897

b) Rs.3758

c) Rs.3900

d) Rs.3290

e) None of these

Q.4) Of the three numbers, second is twice the third and is thrice the first. If average of the three numbers is 55, then largest number is

a) 95

b) 76

c) 90

d) 93

e) 88

Q.5) In factory machines are  running the same constant rate. 5 machines can produce a total of 250 materials per hour. At this rate, how many materials could 8 such machines produce in 3 hour?

a) 1387

b) 1200

c) 1367

d) 1208

e) None of these

Q.6) The average height of 11 persons is 144 cm, the average height of first 5 persons is 156 cm, and the average height of last 4 persons is 139 cm. Find the  sum of the heights of 6th and 7th persons

a) 310 cm

b) 248 cm

c) 298 cm

d) 342 cm

e) None of these

Q.7) The average temperature of a week is C. Every day the temperature decreases by  from the previous day. Find the total temperature of Wednesday, Friday & Sunday if first day of the week is Monday?

a) 75⁰C

b) 65⁰C

c) 72⁰C

d) 69⁰C

e) None of these

Q.8) A car company produced an average of 1500 cars per year for the first 2 years. How much cars it must produce on an average per year over the next 3 years to average 1575 cars per year over the 5 year?

a) 1755

b) 1625

c) Cannot be determined

d) 1865

e) None of these

Q.9) The average age of X, Y, and Z is 2 years less than X age. Y’s age is twice as the Z ‘s age, If Y age was 36 years. Then X age is,

a) 24 yrs

b) 28 yrs

c) 31 yrs

d) 18 yrs

e) 30 yrs

Q.10) Second number is equal to the twenty percent of third number. Third number is equal to the two-fifth of fourth number. If the value of fourth number is 6800, the first number is equal to the 25% of second number. Find the average value of the four numbers,

a) 2550

b) 2680

c) 3890

d) 3280

e) 4109

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