Quiz Discussion

The average of five different positive numbers is 25. x is the decrease in the average when the smallest number among them is replaced by 0. What can be said about x?

Course Name: Quantitative Aptitude

  • 1] x is less than 5
  • 2] x is greater than 5
  • 3] x is equal to 5
  • 4] Cannot be determined
Solution
No Solution Present Yet

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# Quiz
1
Discuss

Find the average increase rate, if increase in the population in the first year is 30% and that in the second year is 40%.

  • 1] 41%
  • 2] 56%
  • 3] 40%
  • 4] 38%
  • 5] 39%
Solution
2
Discuss

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 :

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

Out of 9 persons, 8 persons spent Rs. 30 on each of their meals. The ninth one spends Rs. 20 more than the average expenditure of all the nine. The total money spent by all of them was

  • 1]

    Rs 260

  • 2]

    Rs 290

  • 3]

    Rs 292.5

  • 4]

    Rs 400.5

Solution
4
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
5
Discuss

Average of a, b, and c is 11; average of c, d and e is 17; average of e and f is 22 and average of e and c is 17. Find out the average of a, b, c, d, e and f.

  • 1]

    \(15\frac{2}{3}\)

  • 2]

    \(18\frac{1}{2}\)

  • 3]

    \(16\frac{1}{2}\)

  • 4]

    None of these

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

If the mean of 4 observations is 20, when a constant 'c' is added to each observation, the mean becomes 22. The value of c is :

  • 1]

    6

  • 2]

    -2

  • 3]

    2

  • 4]

    4

Solution
8
Discuss

In the first 10 overs of a cricket game, the run rate was only 3.2. The run rate in the remaining 40 overs to reach the target of 282 run is :

  • 1] 6.4
  • 2] 6.3
  • 3] 6.25
  • 4] 6.5
Solution
9
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
10
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
# Quiz