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A person spends 1/5th of his income on the education of his children, and 20% of the remaining on food. If he is left with Rs.576 find his income?

Correct answer: A. Rs.900

  • A. Rs.900
  • B. Rs.800
  • C. Rs.500
  • D. Rs.1000

Explanation

If the income is x rupees, education uses 1/5, leaving 4/5x rupees. Food uses 20% of this remainder, so 80% remains: 0.8 x 0.8x = 0.64x = Rs.576, hence x = Rs.576/0.64 = Rs.900. The likely trap is Rs.800, which results from applying the 20% food deduction to the original income instead of the remaining income.

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