Quiz Discussion

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 ?

Course Name: Quantitative Aptitude

  • 1] 76 kg
  • 2] 77 kg
  • 3] 74 kg
  • 4] 75 kg
Solution
No Solution Present Yet

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# Quiz
1
Discuss

Five years ago the average age of A, B, C, D was 45 years. By including X the present average of all the five is 49 years. Them the present age of X is-

  • 1] 40 years
  • 2] 45 years
  • 3] 48 years
  • 4] 64 years
Solution
2
Discuss

The average monthly income of P and Q is Rs. 6000; that of Q and R is Rs. 5250; and that P and R is Rs. 5500. What is P’s monthly income?

 

  • 1] Rs. 3500
  • 2] Rs. 4500
  • 3] Rs. 6250
  • 4] Rs. 4800
Solution
3
Discuss

A batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3. Find his average after 17th inning.

  • 1]

    40

  • 2]

    39

  • 3]

    52

  • 4]

    55

Solution
4
Discuss

There were 35 students in a hostel. Due to the admission of 7 new student, the expenses of the mess were increased by Rs. 42 per day, while the average expenditure per head diminished by Re 1. What was the original expenditure of the mess?

  • 1]

    432

  • 2]

    442

  • 3]

    420

  • 4]

    415

Solution
5
Discuss

10 years ago, the average age of a family of 4 members was 24 years. Two children having been born (with age difference of 2 years), the present average age of the family is again 24 years. Then the present age of the youngest child is:

  • 1]

    1 years

  • 2]

    2 years

  • 3]

    3 years

  • 4]

    4 years

Solution
6
Discuss

The average age of 40 students of class is 18 years. When 20 new students are admitted to the same class, the average age of the students of the class is increased by 6 months. The average age of newly admitted students is ?

  • 1] 19 years
  • 2] 19 years 6 months
  • 3] 20 years
  • 4] 20 years 6 months
Solution
7
Discuss

From a class of 42 boys, a boy aged 10 years goes away and in his place, a new boy is admitted. If on account of this change, the average age of the boys in that class increases by 2 months, the age of the newcomer is :

  • 1] 19 years
  • 2] 17 years
  • 3] 10 years 6 months
  • 4] 12 years 2 months
Solution
8
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
9
Discuss

If the mean of a,b,c is M and ab+bc+ca=0, then the mean of a2,b2,c2 is:

  • 1]

    M2

  • 2]

    3M2

  • 3]

    6M2

  • 4]

    9M2

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