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7th Class Mathematics Comparing Quantities Question Bank Self Test-7

  • question_answer
    For every 14 apple that Peter buys 4 turn out to be rotten. At this rate, how many rotten apple will Peter have if he buys 105 apples?

    A)  10          

    B)  20           

    C)  15         

    D)  30

    E)             None of these

    Correct Answer: D

    Solution :

    Suppose peter has \[x\] rotten apple, if he buys 105 apples. According to question, \[x:105::\text{ }4:14\] \[\Rightarrow 14x=105x4\] \[\Rightarrow 14x=420\Rightarrow x=420/14\Rightarrow x=30\]


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