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7th Class Mathematics Integers Question Bank Number System

  • question_answer
    Arwin earns Rs. 1200 per month, he spends \[\frac{1}{4}\] of his income on food, \[\frac{3}{10}\] of the remaining money on house rent and \[\frac{5}{21}\] of the remaining money on the education of his children. How much money does he save in a month?

    A)  Rs. 450                        

    B)  Rs. 420         

    C)  Rs. 400            

    D)  Rs. 480

    Correct Answer: D

    Solution :

    (d): \[1200-\frac{1}{4}\times 1200=900\] \[900-\frac{3}{10}\times 900=630\] \[630-\frac{5}{21}\times 630=480\]Rs /-.(savings)


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