Quiz Discussion

The average monthly salary of 660 workers in a factory is Rs. 380. The average monthly salary of officers is Rs. 2100 and the average monthly salary of the other workers is Rs. 340. Find the number of other workers.

 

Course Name: Quantitative Aptitude

  • 1] 645
  • 2] 650
  • 3] 640
  • 4] 642
Solution
No Solution Present Yet

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# Quiz
1
Discuss

The average salary of all the workers in a workshop is Rs.8000. The average salary of 7 technicians is Rs.12000 and the average salary of the rest is Rs.6000. The total number of workers in the workshop is

  • 1]

    20

  • 2]

    21

  • 3]

    22

  • 4]

    23

Solution
2
Discuss

The average of x number is y and average of y numbers is x. Then the average of all the numbers taken together is

  • 1]

    (x+y)/2xy

  • 2]

    2xy/(x+y)

  • 3]

    (x2+y2)/(x+y)

  • 4]

    xy/(x+y)

Solution
3
Discuss

In a school with 600 students, the average age of the boys is 12 years and that of the girls is 11 years. If the average of the school is 11 years 9 months, then the average the number of girls in the school is :

  • 1] 150
  • 2] 250
  • 3] 350
  • 4] 450
Solution
4
Discuss

The average of the largest and smallest 3 digits numbers formed by 0, 2 and 4 would be :

  • 1] 312
  • 2] 222
  • 3] 213
  • 4] 303
Solution
5
Discuss

The average age of the mother and her six children is 12 years which is reduced by 5 years if the age of the mother is excluded. How old is the mother ?

  • 1] 40 years
  • 2] 42 years
  • 3] 48 years
  • 4] 50 years
Solution
6
Discuss

The average age of husband and his wife was 23 years at the time of their marriage. After five tears they have a one-year old child. The average age of the family of three, when the child was born, was-

  • 1] 23 years
  • 2] 24 years
  • 3] 18 years
  • 4] 20 years
Solution
7
Discuss

A student finds the average of 10 positive integers. Each integer contains two digits. By mistake, the boy interchanges the digits of one number say ba for ab. Due to this, the average becomes 1.8 less than the previous one. What was the difference of the two digits a and b?

  • 1] 8
  • 2] 6
  • 3] 2
  • 4] 4
Solution
8
Discuss

The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class is-

  • 1] 1 : 2
  • 2] 2 : 3
  • 3] 3 : 4
  • 4] 3 : 5
Solution
9
Discuss

Out of four numbers the average of the first three is 16 and that of the last three is 15. If the last number is 20, than first number is :

  • 1] 25
  • 2] 21
  • 3] 23
  • 4] 28
Solution
10
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
# Quiz