Mathematical Aptitude - Ratio Proportion, Percentage and Discounting

Avatto > > UGC NET PAPER 1 > > PRACTICE QUESTIONS > > Mathematical Aptitude > > Ratio Proportion, Percentage and Discounting

6. In an organization, 40% of the employees are matriculates, 50% of the remaining employees are graduates, and the remaining 180 are postgraduates. How many employees are graduates?

  • Option : D
  • Explanation : Let total employees = 100
    Matriculates = 40
    Remaining = 100 − 40 = 60
    Graduates = 50% of remaining 60 = 30
    Postgraduates = 100 − 40 − 30 = 30
    Graduates = Postgraduates
    Hence, graduates are also 180
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7. In a town, 96% of the population is 23,040. The total population of the town is

  • Option : B
  • Explanation : 96% of total population = 23,040
    Hence, total population = 23,040 × 100/96 = 24,000
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8. If 75% of the students in a school are boys and the number of girls is 420, then the number of boys is

  • Option : C
  • Explanation : Ratio between boys: girls = 75%: 25% = 3 : 1
    Hence, number of boys = 3 × 420 = 1,260
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9. A man spends Rs 3500 and saves 12 1/2 % of his income. His monthly income (in Rs ) is

  • Option : B
  • Explanation : (100 – 12.5)%, i.e., 87.5% of total income = 3500,
    total income = 3,500 × 100/87.5 = 4000
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10. The price of an item increased by 20% and then decreased by 20%. The final price as compared to the original price is

  • Option : D
  • Explanation : +20 − 20 + (−20) × (+20)/100 = −4%
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