Quiz Discussion

The average age of A, B, C, D and E is 40 years. The average age of A and B is 35 years and the average of C and D is 42 years. Age of E is :

Course Name: Quantitative Aptitude

  • 1] 48 years
  • 2] 46 years
  • 3] 42 years
  • 4] 45 years
Solution
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# Quiz
1
Discuss

The average temperature for Wednesday, Thursday and Friday was 40°C. The average for Thursday, Friday and Saturday was 41° C. If temperature on Saturday was 42° C, what was the temperature on Wednesday?

  • 1] 39° C
  • 2] 44° C
  • 3] 38° C
  • 4] 41° C
Solution
2
Discuss

A cricketer scored some runs in his 21st innings, as a result, his average runs increased by 3. If the present average run is 40, how many runs he scored in the final innings?

  • 1] 103
  • 2] 100
  • 3] 85
  • 4] 82
Solution
3
Discuss

The average age of 24 boys and their teacher is 15 years. When the teacher's age is excluded, the average age decreases by 1 year. The age of the teacher is :

  • 1] 38 years
  • 2] 39 years
  • 3] 40 years
  • 4] 41 years
Solution
4
Discuss

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

  • 1] 41%
  • 2] 56%
  • 3] 40%
  • 4] 38%
  • 5] 39%
Solution
5
Discuss

The average monthly salary of 12 workers and 3 managers in a factory was Rs. 600. When one of the manager whose salary was Rs. 720, was replaced with a new manager, then the average salary of the team went down to 580. What is the salary of the new manager?

  • 1] 640
  • 2] 690
  • 3] 420
  • 4] 570
Solution
6
Discuss

The average (arithmetic mean) of 330, 360 and 390 is :

  • 1]

    \({3^{27}} + {3^{57}} + {3^{87}}\)

  • 2]

    \({3^{29}} + {3^{59}} + {3^{89}}\)

  • 3]

    \({3^{60}}\)

  • 4]

    \({3^{177}}\)

Solution
7
Discuss

The average weight of 8 men is increased by 1.5 kg when one of the men, who weight 65 kg is replaced by a new man. The weight of the new man is-

  • 1] 70 kg
  • 2] 74 kg
  • 3] 76 kg
  • 4] 77 kg
Solution
8
Discuss

The average age of 30 students of a class is 14 years 4 months. After admission of 5 new students in the class the average becomes 13 years 9 months. The youngest one of the five new students is 9 years 11 months old. The average age of the remaining 4 new students is :

  • 1] 10 years 4 months
  • 2] 12 years 4 months
  • 3] 11 years 2 months
  • 4] 13 years 6 months
Solution
9
Discuss

The average weight of a group of 75 girls was calculated as 47 kgs. It was later discovered that the weight of one of the girls was read as 45 kgs. Whereas her actual weight was 25 kgs. What is the actual average weight of the group of 75 girls? ( Rounded off to two digits after decimal).

  • 1] 34
  • 2] 36
  • 3] 30
  • 4] None of these
Solution
10
Discuss

The average of 25 results is 18. The average of first 12 of those is 14 and the average of last 12 is 17. What is the 13th result?

 

  • 1] 74
  • 2] 75
  • 3] 69
  • 4] 78
Solution
# Quiz