Aptitude - Aptitude-Percentage

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If 15% of 40 is greater than 25% of a number by 2, the number is?

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

    15/100 * 40 - 25/100 * x = 2 or x/4 = 4 so x = 16

In an election between two candidates, 75 % of the voters cast their votes, out of which 2% of the votes were declared invalid. A candidate got 9261 votes which were 75% of the total valid votes. Find the total number of votes?

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

    Let the total number of votes enrolled are x.
    Number of votes cast = 75% of x
    Valid votes = 98% of 75% of x

    Now, as 9261 is the 75% of valid casted votes so,

    75% of 98% of 75% of x = 9261 [imporant]

    =>75×98×75×x100×100×100=9261=>x=16800

In expressing a length of 81.472 km as nearly as possible with the three significant digits, find the percentage error?

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

    Error = (81.5 - 81.472) = 0.028
    Required percentage =
    0.02881.472×100=0.034

If sales tax is reduced from 5% to 4%, then what difference it will make if you purchase an item of Rs. 1000?

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

    Clue: Answer will be 5% of 1000 - 4% of 1000

An inspector rejects 0.08% of the meters as defective, How many meters he examine to reject 2 meteres?

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

    It means that 0.08% of x = 2
    =>(8100×100×x)=2=>x=2×100×1008=>x=2500

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