Quiz Discussion

The mean weight of 100 students in a class is 46 kg. The mean weight of boys is 50 and of girls is 40 kg. Therefore, the number of boys is:

Course Name: Quantitative Aptitude

  • 1] 50
  • 2] 60
  • 3] 70
  • 4] 65
Solution
No Solution Present Yet

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# Quiz
1
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
2
Discuss

The average of 10 items was found to be 80 but while calculating, one of the items was counted as 60 instead of 50. Then the correct average would have been :

  • 1] 69
  • 2] 79.25
  • 3] 79
  • 4] 79.5
Solution
3
Discuss

The present age of a father is 3 years more than three times the age of his son. Three years hence, father's age will be 10 years more than twice the age of the son. The father's age is :

  • 1] 33 years
  • 2] 39 years
  • 3] 45 years
  • 4] 40 years
Solution
4
Discuss

The average of marks in Mathematics for 5 students was found to do 50. Later, it was discovered that in the case of one student the marks 48 were misread as 84. The correct average is :

  • 1] 40.2
  • 2] 40.8
  • 3] 42.8
  • 4] 48.2
Solution
5
Discuss

30 pens and 75 pencils altogether were purchased for Rs. 510. If the average price of a pencil was Rs. 2, what was the average price of a pen ?

  • 1] Rs. 9
  • 2] Rs. 10
  • 3] Rs. 11
  • 4] Rs. 12
Solution
6
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
7
Discuss

A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is

  • 1]

    285

  • 2]

    276

  • 3]

    280

  • 4]

    290

Solution
8
Discuss

A train covers the first 16 km at a speed of 20 km per hour another 20 km at 40 km per hour and the last 10 km at 15 km per hour. Find the average speed for the entire journey.

 

  • 1]

    24 km

  • 2]

    26 km

  • 3]

    21 km

  • 4]

    km

Solution
9
Discuss

Five years ago, the average age of P and Q was 25. The average age of P, Q and R today is 25. Age of R after 5 years will be :

  • 1] 15 years
  • 2] 20 years
  • 3] 40 years
  • 4] 35 years
Solution
10
Discuss

3 years age, the average age of a family of 5 members was 17 years. A baby having been born, the average age of the family is same today. The present age of the baby is :

  • 1]

    1 years

  • 2]

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

  • 3]

    2 years

  • 4]

    3 years

Solution
# Quiz