Quiz Discussion

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?

Course Name: SQL -Structured Query Language

  • 1] 640
  • 2] 690
  • 3] 420
  • 4] 570
Solution
No Solution Present Yet

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# Quiz
1
Discuss

The average age of 20 boys in a class is 12 years. 5 new boys are admitted to the class whose average age is 7 years. The average age of all the boys in the class becomes:

  • 1] 8.2 years
  • 2] 9.5 years
  • 3] 12.5 years
  • 4] 11 years
Solution
2
Discuss

The average age of a class is 15.8 years. The average age of the boys in the class is 16.4 years while that of the girls is 15.4 years. What is the ratio of boys to girls in the class?

  • 1]

    1:2

  • 2]

    2:3

  • 3]

    3:4

  • 4]

    3:5

Solution
3
Discuss

If the arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is :

  • 1] 10
  • 2] 12
  • 3] 14
  • 4] 16
Solution
4
Discuss

The average age of 30 students is 9 years. If the age of their teacher is included, the average age becomes 10 years. The age of the teacher (in years) is :

  • 1] 27
  • 2] 31
  • 3] 35
  • 4] 40
Solution
5
Discuss

The average age of a family of 10 members is 20 years. If the age of the youngest member of the family is 10 years, then the average age of the members of the family just before the birth of the youngest member was approximately.

  • 1]

    27.14 years

  • 2]

    12.5 years

  • 3]

    14.28 years

  • 4]

    \(11\frac{1}{9}\) years

Solution
6
Discuss

In a set of three numbers, the average of first two numbers is 2, the average of the last two numbers is 3, and the average of the first and the last numbers is 4. What is the average of three numbers?

  • 1] 2
  • 2] 2.5
  • 3] 3
  • 4] 3.5
Solution
7
Discuss

The average of 11 players of a cricket team is decreased by 2 months when two of them aged 17 years and 20 years are replaced by two new players. The average age of the new players is-

  • 1] 17 years 1 month
  • 2] 17 years 7 months
  • 3] 17 years 11 months
  • 4] 18 years 3 months
Solution
8
Discuss

Students of three different classes appeared in common examination. Pass average of 10 students of first class was 70%, pass average of 15 students of second class was 60% and pass average of 25 students of third class was 80% then what will be the pass average of all students of three classes?

 

  • 1] 74%
  • 2] 75%
  • 3] 69%
  • 4] 72%
Solution
9
Discuss

Nine persons went to a hotel for taking their meals. Eight of them spent Rs. 12 each on their meals and the ninth spent Rs. 8 more than the average expenditure of all the nine. What was the total money spent by them.

  • 1] Rs. 115
  • 2] Rs. 116
  • 3] Rs. 117
  • 4] Rs. 118
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