Average Mcqs - Set 8

1)   The average salary per head of the entire staff of an office including the officers and clerks is Rs.90. The average salary of officers is Rs.600 and that of the clerks is Rs.84. If the number of officers is 2, find the number of officers in the office?

a. 1540
b. 960
c. 840
d. 1020
Answer  Explanation 

ANSWER: 1020

Explanation:
No explanation is available for this question!


2)   The average weight of 25 persons sitting in a boat had some value. A new person added to them whose weight was 46 kg only. Due to his arrival, the average weight of all the persons decreased by 5 kg. Find the average weight of first 25 persons?

a. 55 kg
b. 62 kg
c. 56 kg
d. None
Answer  Explanation 

ANSWER: None

Explanation:
25x + 46 = 26(x – 5)

x = 176


3)   The average marks in mathematics scored by the students of a school at the public examination were 39. If four of these students who actually scored 5, 12, 15 and 19 marks at the examination had not been sent up, the average marks for the school would have been 44. Find the number of students sent up for examination from the school?

a. 20
b. 25
c. 30
d. 32
Answer  Explanation 

ANSWER: 25

Explanation:
39x = 5 + 12 + 15 + 19 + (x – 4)44

x = 25


4)   Nine men went to a hotel. Eight of them spent Rs.3 each over their meals and the ninth spent Rs.2 more than the average expenditure of all the nine. Determine the total money spent by them?

a. Rs.29.25
b. Rs.30.25
c. Rs.32
d. Rs.35
Answer  Explanation 

ANSWER: Rs.29.25

Explanation:
Average of 9 = x

9x = 8 * 3 + x * 2 x = 3.25

Total = 9 * 3.25 = 29.25


5)   The average age 9 members of a committee are the same as it was 2 years ago, because an old number has been replaced by a younger number. Find how much younger is the new member than the old number?

a. 7 years
b. 11 years
c. 18 years
d. 27 years
Answer  Explanation 

ANSWER: 18 years

Explanation:
9 * 2 = 18 years


6)   The average temperature for Monday, Tuesday, Wednesday and Thursday was 48 degrees and for Tuesday, Wednesday, Thursday and Friday was 46 degrees. If the temperature on Monday was 42 degrees. Find the temperature on Friday?

a. 40 degrees
b. 38 degrees
c. 36 degrees
d. 34 degrees
Answer  Explanation 

ANSWER: 34 degrees

Explanation:
M + Tu + W + Th = 4 * 48 = 192

Tu + W + Th + F = 4 * 46 = 184

M = 42

Tu + W + Th = 192 -42 = 150

F = 184 – 150 = 34


7)   A man purchased 3 blankets @ Rs.100 each, 5 blankets @ Rs.150 each and two blankets at a certain rate which is now slipped off from his memory. But he remembers that the average price of the blankets was Rs.150. Find the unknown rate of two blankets?

a. Rs.150
b. Rs.225
c. Rs.250
d. None
Answer  Explanation 

ANSWER: None

Explanation:
10 * 150 = 1500

3 * 100 + 5 * 150 = 1050

1500 – 1050 = 450


8)   A building contractor employs 20 male, 15 female and 5 child workers. To a male worker he pays Rs.25 per day, to a female worker Rs.20 per day and a child worker Rs.8 per day. The average wage per day paid by the contractor is__________?

a. Rs.20
b. Rs.21
c. Rs.22
d. Rs.23
Answer  Explanation 

ANSWER: Rs.21

Explanation:
20 15 5

25 20 8

500 + 300 + 40 = 840/40 = 21


9)   Visitors to show were charged Rs.15 each on the first day. Rs.7.50 on the second day, Rs.2.50 on the third day and total attendance on the three days were in ratio 2:5:13 respectively. The average charge per person for the whole show is___________?

a. Rs.3
b. Rs.4.50
c. Rs.5.00
d. Rs.7.50
Answer  Explanation 

ANSWER: Rs.5.00

Explanation:
2: 5: 13

2x 5x 13x

15 7.5 2.5

30x + 37.5x + 32.5x = 100x/20x

Average = 5


10)   In a hostel there were 100 students. To accommodate 20 more students the average is decreased by rupees 5. But total expenditure increased by Rs.400. Find the total expenditure of the hostel now?

a. Rs.5000
b. Rs.4600
c. Rs.5400
d. Rs.2300
Answer  Explanation 

ANSWER: Rs.5400

Explanation:
100x + 400 = 12(x – 5)

x = 50

100 * 50 + 400 = 5400