Quiz Discussion

The average weight of 10 oarsmen in a boat is increased by 1.5kg when one of the crew who weighs 58kg is replaced by a new man.

Course Name: Quantitative Aptitude

  • 1]

    73 Kg

  • 2]

    64 Kg

  • 3]

    12 Kg

  • 4]

    34 Kg

Solution
No Solution Present Yet

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# Quiz
1
Discuss

The average price of 10 books is Rs.12 while the average price of 8 of these books is Rs.11.75. Of the remaining two books, if the price of one book is 60% more than the price of the other, what is the price of each of these two books?

  • 1] Rs. 5, Rs.7.50
  • 2] Rs. 8, Rs. 12
  • 3] Rs. 16, Rs. 10
  • 4] Rs. 12, Rs. 14
Solution
2
Discuss

David obtained 76, 65, 82, 67 and 85 marks (out of 100) in English, mathematics, physics, chemistry and biology. What are his average marks?

  • 1] 65
  • 2] 69
  • 3] 75
  • 4] None of these
Solution
3
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
4
Discuss

The average of nine number is 50. The average of first five numbers is 54 and that of the last three numbers is 52. Then the sixth number is :

  • 1] 30
  • 2] 34
  • 3] 24
  • 4] 44
Solution
5
Discuss

The average of a group of men is increased by 5 years when a person aged of 18 years is replaced by a new person of aged 38 years. How many men are there in the group?

 

  • 1] 3
  • 2] 4
  • 3] 5
  • 4] 6
  • 5] 7
Solution
6
Discuss

The average age of a class is 15.8 years. The average age of the boys in the class is 16.4 years while that of the girls is 15.4 years. What is the ratio of boys to girls in the class?

  • 1]

    1:2

  • 2]

    2:3

  • 3]

    3:4

  • 4]

    3:5

Solution
7
Discuss

If the arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is :

  • 1] 10
  • 2] 12
  • 3] 14
  • 4] 16
Solution
8
Discuss

The average age of an adult class is 40 years. 12 new students with an average age of 32 years join the class, thereby decreasing the average by 4 years. The original strength of the class was-

  • 1] 10
  • 2] 11
  • 3] 12
  • 4] 15
Solution
9
Discuss

In a set of three numbers, the average of first two numbers is 2, the average of the last two numbers is 3, and the average of the first and the last numbers is 4. What is the average of three numbers?

  • 1] 2
  • 2] 2.5
  • 3] 3
  • 4] 3.5
Solution
10
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
# Quiz