Aptitude - Aptitude-Percentage

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Rahul's Mathematics test had 75 problems, 10 arithmetic, 30 algebra, 35 geometry problems. Although he answered 70% of arithmetic, 40% of arithmetic and 60% of geometry problems correctly, still he got less than 60% problems right. How many more questions he would have to answer more to get passed?

  • a
  • b
  • c
  • d
  • OOPS, your answer is incorrect

    Number of questions attempted correctly = (70% of 10 + 40% of 30 + 60% of 35)
    = 7 + 12 + 21 = 40.

    Questions to be answered correctly for 60% = 60% of total quations
    = 60 % of 75 = 45.

    He would have to answer 45 - 40 = 5

One fourth of one third of two fifth of a number is 15. What will be 40% of that number

  • a
  • b
  • c
  • d
  • OOPS, your answer is incorrect

    (1/4) * (1/3) * (2/5) * x = 15 then x = 15 * 30 = 450
    40% of 450 = 180

Two students appeared at an examination. One of them secured 9 marks more than the other and his marks was 56% of the sum of their marks. The marks obtained by them are?

  • a
  • b
  • c
  • d
  • OOPS, your answer is incorrect

    Let their marks be (x+9) and x.
    Then, x+9 = 56/100(x + 9 +x)
    => 25(x+9)
    => 14 (2x + 9)
    => 3x = 99
    => x = 33.
    So, their marks are 42 and 33

Three candidates contested an election and received 1136, 7636 and 11628 votes respectively. What percentage of the total votes did the winning candidate got?

  • a
  • b
  • c
  • d
  • OOPS, your answer is incorrect

    Total number of votes polled = (1136 + 7636 + 11628) = 20400

    So, Required percentage = 11628/20400 * 100 = 57%

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