Quiz Discussion

The average weight of 10 oarsmen in a boat is increased by 1.5kg when one of the crew who weighs 58kg is replaced by a new man.

Course Name: Quantitative Aptitude

  • 1]

    73 Kg

  • 2]

    64 Kg

  • 3]

    12 Kg

  • 4]

    34 Kg

Solution
No Solution Present Yet

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# Quiz
1
Discuss

The average of six numbers is x and the average of three of these is y. If the average of the remaining three is z, then-

  • 1] x = y + z
  • 2] 2x = y + z
  • 3] x = 2y + 2z
  • 4] None of these
Solution
2
Discuss

The average sale of car dealership was 15 cars per week. After a promotional scheme the average sale increased to 21 cars per week. The percentage increased in the sale of cars was-

  • 1]

    39.33%

  • 2]

    40%

  • 3]

    \(42\frac{6}{7}\)%

  • 4]

    140%

Solution
3
Discuss

The average of the first five multiples of 9 is:

 

  • 1] 20
  • 2] 27
  • 3] 28
  • 4] 30
Solution
4
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
5
Discuss

The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is :

  • 1] 40 years
  • 2] 35 years
  • 3] 50 years
  • 4] None of the options
Solution
6
Discuss

The mean of 25 observations was found to be 78.4. But later on it was found that 96 were misread as 69. The correct means is-

  • 1] 76.54
  • 2] 78.4
  • 3] 79.48
  • 4] 81.32
Solution
7
Discuss

Average weight of 25 students of a class is 50 kg. If the weight of the class teacher is included , the average is increased by 1 kg. The weight of the teacher is ?

  • 1] 76 kg
  • 2] 77 kg
  • 3] 74 kg
  • 4] 75 kg
Solution
8
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
9
Discuss

The average income of A, B and C is Rs. 12,000 per month and average income of B, C and D is Rs. 15,000 per month. If the average salary of D be twice that of A, then the average salary of B and C is in Rs. :

  • 1] 8,000
  • 2] 18,000
  • 3] 13,500
  • 4] 9,000
Solution
10
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
# Quiz