11th Class Mathematics Sample Paper Maths Olympiad Model Test Paper-10

  • question_answer
    Let \[{{n}_{1}}<{{n}_{2}}<{{n}_{3}}<{{n}_{4}}<{{n}_{5}}\] be positive integers such that \[{{n}_{1}}+{{n}_{2}}+{{n}_{3}}+{{n}_{4}}+{{n}_{5}}=20\]. Then, the number of such distinct arrangements \[({{n}_{1}},\,\,{{n}_{2}},\,\,{{n}_{3}},\,\,{{n}_{4}},\,\,{{n}_{5}})\] is________.

    A)  3                                            

    B)  5

    C)  7        

    D)  9

    E)  None of these

    Correct Answer: C

    Solution :

     Not Available               

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