Quiz Discussion

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 :

Course Name: Quantitative Aptitude

  • 1] 38 years
  • 2] 39 years
  • 3] 40 years
  • 4] 41 years
Solution
No Solution Present Yet

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# Quiz
1
Discuss

The average annual income (in Rs.) of certain agricultural workers is S and that of other workers is T. The number of agricultural workers is 11 times that of other workers. Then the average monthly income (in Rs.) of all the workers is 

  • 1]

    (S+T)/2

  • 2]

    (S+11T)/2

  • 3]

    (1/11S)+T

  • 4]

    (11S+T)/12

Solution
2
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
3
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
4
Discuss

3 years age, the average age of a family of 5 members was 17 years. A baby having been born, the average age of the family is same today. The present age of the baby is :

  • 1]

    1 years

  • 2]

    \(1\frac{1}{2} \)years

  • 3]

    2 years

  • 4]

    3 years

Solution
5
Discuss

The reduction in the speed of an engine is directly proportional to the square of the number of bogies attached to it. The speed of the train is 100 km/hr when there are 4 bogies and 55 kmph when there are 5 bogies. What is the maximum number of bogies that can be attached to the train so that it can move?

  • 1]

    4

  • 2]

    5

  • 3]

    6

  • 4]

    7

Solution
6
Discuss

The mean weight of 34 students of a school is 42 kg. If the weight of the teacher be included, the mean rises by 400 grams. Find the weight of the teacher (in kg.)

  • 1] 55 kg
  • 2] 57 kg
  • 3] 66 kg
  • 4] 56 kg
Solution
7
Discuss

A librarian purchased 50 storybooks for his library. But he saw that he could get 14 books more by spending Rs. 76 more but per book average becomes Rs. 1 less. The average price (in Rs.) of each book he bought, was :

  • 1] 15
  • 2] 25
  • 3] 20
  • 4] 10
Solution
8
Discuss

Out of 20 boys, 6 are each of 1 m 15 cm height, 8 are of 1 m 10 cm and rest of 1 m 12 cm. The average height of all of them is :

  • 1] 1 m 12.1 cm
  • 2] 1 m 21.1 cm
  • 3] 1 m 21 cm
  • 4] 1 m 12 cm
Solution
9
Discuss

The average age of the boys in a class is 16 years and that of the girls is 15 years. The average age for the whole class is-

  • 1] 15 years
  • 2] 15.5 years
  • 3] 16 years
  • 4] Cannot be computed with the given information
Solution
10
Discuss

The average weight of A, B and C is 40 kgs. Weight of C is 24 kgs more than A’s weight and 3 kgs less than B’s weight. What will be the average weight of A, B, C and D, if D weights 15 kgs less than C?

  • 1] 42 kgs
  • 2] 40 kgs
  • 3] 36 kgs
  • 4] 38 kgs
Solution
# Quiz