Quiz Discussion

The average pocket money of 3 friend A, B, C is Rs. 80 in a particular month. If B spends double and C spends triple of what A spends during that month and if the average of their unspent pocket money is Rs. 60, then A spends (in Rs.)-

Course Name: Quantitative Aptitude

  • 1] Rs. 10
  • 2] Rs. 20
  • 3] Rs. 30
  • 4] Rs. 40
Solution
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# Quiz
1
Discuss

The average weight of 21 boys was recorded as 64 kg. If the weight of the teacher was added, the average increased by 1 kg. What was the teacher’s weight?

  • 1] 86 kg
  • 2] 64 kg
  • 3] 72 kg
  • 4] 84 kg
Solution
2
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
3
Discuss

Average of two numbers is 8 and average of other three numbers is 3; the average of the five numbers is :

  • 1] 2
  • 2] 3
  • 3] 5
  • 4] 6
Solution
4
Discuss

Of the three numbers, the first is twice the second and the second is twice the third. The average of the reciprocal of the numbers is 7/72. The numbers are:

 

  • 1] 36, 18, 9
  • 2] 24, 12, 6
  • 3] 20, 10, 5
  • 4] 16, 8, 4
Solution
5
Discuss

The speed of the train going from Nagpur to Allahabad is 100 km/h while when coming back from Allahabad to Nagpur, its speed is 150 km/h. find the average speed during whole journey.

 

  • 1] 125 km/hr
  • 2] 75 km/hr
  • 3] 135 km/hr
  • 4] 120 km/hr
Solution
6
Discuss

A shop of electronic goods is closed on Monday. The average daily sales for remaining six days of a week is Rs. 15,640 and the average sale of Tuesday to Saturday is Rs. 14,124. The sales on Sunday is -

  • 1] Rs. 20,188
  • 2] Data inadequate
  • 3] Rs. 23,220
  • 4] Rs. 21,704
Solution
7
Discuss

If the average of x and 1/x(X\( \ne \)0) is M, then the average of x2 and 1/x2 is :

 

  • 1] 1 - M2
  • 2] 1 - 2M2
  • 3] 2M2 - 1
  • 4] 2M2 + 1
Solution
8
Discuss

The average of two numbers is XY. If one number is X, the other is-

  • 1]

    Y/2

  • 2]

    Y

  • 3]

    2XY - X

  • 4]

    X (Y - 1)

Solution
9
Discuss

David obtained 76, 65, 82, 67 and 85 marks (out of 100) in English, mathematics, physics, chemistry and biology. What are his average marks?

  • 1] 65
  • 2] 69
  • 3] 75
  • 4] None of these
Solution
10
Discuss

In an exam, the average marks obtained by Jhon in English, Math, Hindi and Drawing were 50. His average mark in Maths, Science, Social Studies and Craft were 70. If the average mark in all seven subjects is 58, his score in Maths was -

  • 1] 50
  • 2] 52
  • 3] 60
  • 4] 74
Solution
# Quiz