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

  • question_answer
    Sum of first n terms in an A.P. is \[\frac{3{{n}^{2}}}{2}+\frac{5n}{2}\] .Find its 25th term.

    A)  72                               

    B)  76

    C)  80                               

    D)  82

    E)  None of these

    Correct Answer: B

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