Quiz Discussion

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 ?

Course Name: Quantitative Aptitude

  • 1] 19 years
  • 2] 19 years 6 months
  • 3] 20 years
  • 4] 20 years 6 months
Solution
No Solution Present Yet

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# Quiz
1
Discuss

A batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3. Find his average after 17th inning.

  • 1]

    40

  • 2]

    39

  • 3]

    52

  • 4]

    55

Solution
2
Discuss

The reduction in the speed of an engine is directly proportional to the square of the number of bogies attached to it. The speed of the train is 100 km/hr when there are 4 bogies and 55 kmph when there are 5 bogies. What is the maximum number of bogies that can be attached to the train so that it can move?

  • 1]

    4

  • 2]

    5

  • 3]

    6

  • 4]

    7

Solution
3
Discuss

The average of 25 results is 18. The average of first 12 of those is 14 and the average of last 12 is 17. What is the 13th result?

 

  • 1] 74
  • 2] 75
  • 3] 69
  • 4] 78
Solution
4
Discuss

Find the average of 205, 302, 108, 403, and 202-

  • 1] 450
  • 2] 1125
  • 3] 244
  • 4] 1220
Solution
5
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
6
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
7
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
8
Discuss

When the average age of a couple and their son was 42 years, the son married and got a child after one year. When the child was 5 years old, the average age of the family became 36 years. What was the age of daughter-in- law at the time of their marriage ?

  • 1] 23 years
  • 2] 24 years
  • 3] 25 years
  • 4] 26 years
Solution
9
Discuss

Average of two numbers is 8 and average of other three numbers is 3; the average of the five numbers is :

  • 1] 2
  • 2] 3
  • 3] 5
  • 4] 6
Solution
10
Discuss

a, b, c, d, e, f, g are consecutive even numbers. j, k, l, m, n are consecutive odd numbers. The average of all the numbers is :

  • 1]

    \(3\left( {\frac{{a + n}}{2}} \right)\)

  • 2]

    \(\left( {\frac{{1 + d}}{2}} \right)\)

  • 3]

    \(\left( {\frac{{a + b + m + n}}{4}} \right)\)

  • 4]

    \(3\left( {\frac{{j + c + n +g}}{4}} \right)\)

Solution
# Quiz