Quiz Discussion

Five years ago, the average age of A, B, C and D was 45 yr. with E joining them now, the average of all the five is 49 yr. How old is E?

 

Course Name: Quantitative Aptitude

  • 1] 25 years
  • 2] 40 years
  • 3] 45 years
  • 4] 64 years
Solution
No Solution Present Yet

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# Quiz
1
Discuss

The average marks obtained by a class of 60 students is 65. The average marks of half of the students is found to be 85. The average marks of the remaining students is :

  • 1] 35
  • 2] 45
  • 3] 55
  • 4] 65
Solution
2
Discuss

Average of 80 numbers are 42. When 5 more numbers are included, the average of 85 numbers become 45. Find the average of 5 numbers.

  • 1] 82
  • 2] 89
  • 3] 93
  • 4] 98
Solution
3
Discuss

The average weight of 8 men is increased by 1.5 kg when one of the men, who weight 65 kg is replaced by a new man. The weight of the new man is-

  • 1] 70 kg
  • 2] 74 kg
  • 3] 76 kg
  • 4] 77 kg
Solution
4
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
5
Discuss

A librarian purchased 50 storybooks for his library. But he saw that he could get 14 books more by spending Rs. 76 more but per book average becomes Rs. 1 less. The average price (in Rs.) of each book he bought, was :

  • 1] 15
  • 2] 25
  • 3] 20
  • 4] 10
Solution
6
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
7
Discuss

The average expenditure of a man for the first five months is Rs. 1200 and for the next seven months is Rs. 1300. If he saves Rs. 2900 in that year, his monthly average income is-

  • 1] Rs. 1500
  • 2] Rs. 1600
  • 3] Rs. 1700
  • 4] Rs. 1400
Solution
8
Discuss

Find the average of all prime numbers between 30 and 50.

  • 1]

    37.8

  • 2]

    38.9

  • 3]

    39.8

  • 4]

    42.8

Solution
9
Discuss

The average of x number is y and average of y numbers is x. Then the average of all the numbers taken together is

  • 1]

    (x+y)/2xy

  • 2]

    2xy/(x+y)

  • 3]

    (x2+y2)/(x+y)

  • 4]

    xy/(x+y)

Solution
10
Discuss

The average of five numbers is 306.4. The average of the first two numbers is 431 and the average of the last two numbers is 214.5. What is the third number?

  • 1] 52
  • 2] 108
  • 3] 321
  • 4] Cannot be determined
  • 5] None of these
Solution
# Quiz