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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-18

  • question_answer
    A farmer divides his herd of n cows amongst his four sons, so that the first son gets one-half of the entire herd, the second son gets one-fourth while the third son gets one-fifth and the fourth son gets only 7 cows. The value of n is:

    A) 240                              

    B) 100

    C) 180                              

    D) 140

    Correct Answer: D

    Solution :

     \[\frac{n}{2}+\frac{n}{4}+\frac{n}{5}+7=n\Rightarrow \frac{19n}{20}+7=n\] \[7=20\,n-19n\Rightarrow \,7\times 20=n\Rightarrow n=140\] So, the number of Cows \[=\underline{\mathbf{140}}\]


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