logo

CuriousTab

CuriousTab

Discussion


Home Aptitude Percentage Comments

  • Question
  • A student multiplied a number by 3/5 instead of 5/3, What is the percentage error in the calculation ?


  • Options
  • A. 54 %
  • B. 64 %
  • C. 74 %
  • D. 84 %

  • Correct Answer
  • 64 % 

    Explanation

    Let the number be x.

    Then, ideally he should have multiplied by  x by 5/3. Hence Correct result was x * (5/3)= 5x/3. 

     

    By mistake he multiplied x by 3/5 . Hence the result with error  = 3x/5 

    Then, error = (5x/3 - 3x/5) = 16x/15 

    Error %  = (error/True vaue) * 100 = [(16/15) * x/(5/3) * x] * 100 = 64 %


  • Percentage problems


    Search Results


    • 1. The value of a machine depreciates at the rate of 10% every year. It was purchased 3 years ago. If its present value is Rs. 8748, its purchase price was :

    • Options
    • A. 10000
    • B. 12000
    • C. 14000
    • D. 16000
    • Discuss
    • 2. If 20% of a = b, then b% of 20 is the same as :

    • Options
    • A. 4% of a
    • B. 6% of a
    • C. 8% of a
    • D. 10% of a
    • Discuss
    • 3. Fresh fruit contains 68% water and dry fruit contains 20% water. How much dry fruit can be obtained from 100 kg of fresh fruits ?

    • Options
    • A. 20
    • B. 30
    • C. 40
    • D. 50
    • Discuss
    • 4. In an election between two candidates, one got 55% of the total valid votes, 20% of the votes were invalid. If the total number of votes was 7500, the number of valid votes that the other candidate got, was :

    • Options
    • A. 2500
    • B. 2700
    • C. 2900
    • D. 3100
    • Discuss
    • 5. Profit of Rs 135200 has to be divided among three partners Aashay, Bhairav and Chetan in the ratio 4:3:6. How much Rs. does Chetan get?

    • Options
    • A. 31200
    • B. 41600
    • C. 62400
    • D. 93600
    • Discuss
    • 6. A student has to obtain 33% of the total marks to pass. He got 125 marks and failed by 40 marks. The maximum marks are :

    • Options
    • A. 500
    • B. 600
    • C. 800
    • D. 1000
    • Discuss
    • 7. if the price of a book is first decreased by 25% and then increased by 20%, then the net change in the price will be :

    • Options
    • A. 10
    • B. 20
    • C. 30
    • D. 40
    • Discuss
    • 8. A man spends 35% of his income on food, 25% on children's education and 80% of the remaining on house rent. What percent of his income he is left with ?

    • Options
    • A. 6 %
    • B. 8 %
    • C. 10 %
    • D. 12 %
    • Discuss
    • 9. Gaurav spends 30% of his monthly income on food articles, 40% of the remaining on conveyance and clothes and saves 50% of the remaining. If his monthly salary is Rs. 18,400, how much money does he save every month ?

    • Options
    • A. 3864
    • B. 4903
    • C. 5849
    • D. 6789
    • Discuss
    • 10. In an election only two candidates contested 20% of the voters did not vote and 120 votes were declared as invalid. The winner got 200 votes more than his opponent thus he secured 41% votes of the total voters on the voter list. Percentage votes of the defeated candidate out of the total votes casted is:

    • Options
    • A. 47.5%
    • B. 41%
    • C. 38%
    • D. 45%
    • Discuss


    Comments

    There are no comments.

Enter a new Comment