Quiz Discussion

The mean high temperature of the first four days of a week is 25°C whereas the mean of the last four days is 25.5°C. If the mean of the whole week is 25.2°C then the temperature of the 4th day is :

Course Name: Quantitative Aptitude

  • 1] 25°C
  • 2] 25.2°C
  • 3] 25.6°C
  • 4] 25.5°C
Solution
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# Quiz
1
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
2
Discuss

There are three categories of jobs A, B and C. The average salary of the student who got the job of A and B categories is 26 lakh per annum. The average salary of the students who got the job of B and C category is 44 lakh per annum and the average salary of those students who got the job of A and C categories is 34 lakh per annum. The most appropriate (or closet) range of average salary of all the three categories (if it is known that each student gets only one category of jobs i.e. , A, B and C):

  • 1] lies between 30 and 44
  • 2] lies between 28 and 34
  • 3] lies between 34 and 44
  • 4] lies between 27 and 44
  • 5] None of these
Solution
3
Discuss

The average age of a family with 5 members is 28. If one of the 5 members of age 20 is excluded the average age of the family becomes -

  • 1] 25
  • 2] 20
  • 3] 30
  • 4] 24
Solution
4
Discuss

In a family, the average age of a father and a mother is 35 years. The average age of the father, mother and their only son is 27 years. What is the age of the son?

  • 1] 10 years
  • 2] 10.5 years
  • 3] 11 years
  • 4] 12 years
Solution
5
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
6
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
7
Discuss

The average of 11 results is 60. If the average of first six results is 58 and that of last six is 63, find the 6th result-

  • 1] 66
  • 2] 55
  • 3] 64
  • 4] 68
Solution
8
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
9
Discuss

The average score of a cricketer for ten matches is 38.9 runs. If the average for the first six matches is 42, then find the average for the last four matches.

  • 1] 33.25
  • 2] 33.5
  • 3] 34.25
  • 4] 35
Solution
10
Discuss

The average marks of four subjects is 120. If 33 was misread as 13 during the calculation, what will be the correct average?

 

  • 1] 122
  • 2] 120
  • 3] 125
  • 4] 121
Solution
# Quiz