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  • Question
  • Last year, there were 610 boys in a school. The number decreased by 20% this year. How many girl are there in the school, if the number of boys in the school this year?


  • Options
  • A. 854
  • B. 848
  • C. 798
  • D. 782

  • Correct Answer
  • 854 

    Explanation

    Last year number of boys in school = 610

    ? Number of boys in school this year = 610 - (610 x 20)/100
    = 610 - 122 = 488

    ? Number of girls in school this year
    = Number of boys in school this year x 175%
    = (488 x 175)/100
    = (488 x 7)/4
    = 122 x 7
    = 854

    Hence, number of girls in school this year in 854.


  • Percentage problems


    Search Results


    • 1. 
      In a particular constituency, 75% of voters cast their votes, out of which 2% were rejected. The winning candidate received 75% of the valid votes and bagged a total of 9261 votes. The total number of voters in the constituency is

    • Options
    • A. 14500
    • B. 18900
    • C. 16800
    • D. 24000
    • Discuss
    • 2. 
      from 2008 to 2009, the sales of a book decreased by 80%. If the sales in 2010 was the same as in 2008, by what per cent did it increase from 2009 to 2010?

    • Options
    • A. 80%
    • B. 100%
    • C. 120%
    • D. 400%
    • Discuss
    • 3. 
      The price of two article are as 3 : 4. If the price of the first article is increased by 10% and that if the second by ? 4 one original ratio remains the same. The original price of the second article is

    • Options
    • A. ? 40
    • B. ? 10
    • C. ? 30
    • D. ? 35
    • Discuss
    • 4. 
      A box has 100 blue balls, 50 red ballss and 50 black balls. 25% of blue balls and 50% of red balls are taken away. Then, percentage of black balls at present is?

    • Options
    • A. 25%
    • B. 331/3
    • C. 40%
    • D. 50
    • Discuss
    • 5. 
      A student was asked to measure the length and breadth of a rectangle. By mistake, he measured the length 20% less and the breath 10% more. if its original area is 200 sq cm, then find the area after this measurement?

    • Options
    • A. 176 sq cm
    • B. 206 sq cm
    • C. 226 sq cm
    • D. 316 sq cm
    • Discuss
    • 6. 
      Aryan got 350 marks and Vidya scored 76% marks in the same test. If Vidaya scored 296 marks more than Aryan, then what were the maximum marks of the test?

    • Options
    • A. 650
    • B. 900
    • C. 850
    • D. 950
    • Discuss
    • 7. 
      What should come in place of the question marks(?), so that it satisfies equality of the given equation?

      32% of 750 =?

    • Options
    • A. 23% of 600
    • B. 46% of 207
    • C. 98% of 250
    • D. 75% of 320
    • Discuss
    • 8. 
      In a class X of 30 students, 24 passed in first class; in another class Y of 35 students, 28 passed in first class. In which class was the percentage of students first class more?

    • Options
    • A. Class X has more percentage of students getting first class
    • B. Class Y has more percentage of students getting first class
    • C. Both classes have equal percentage of students getting first class
    • D. None of the above
    • Discuss
    • 9. 
      Veena spends 25% of her monthly income on household expenses. Her annual income is ? 4.32 lakh. What is the total amount that Veena spends on household expenses in 8 months together?

    • Options
    • A. ? 74000
    • B. ? 71000
    • C. ? 73000
    • D. ? 72000
    • Discuss
    • 10. 
      The salary of an employee of a company increase every month by 4%. If his salary in August was ? 6300, then what would be his approximate salary in month of October of the same year?

    • Options
    • A. ? 6552
    • B. ? 6967
    • C. ? 6814
    • D. ? 6627
    • Discuss


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