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  3. 10th Class
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10th Class Mathematics Sample Paper Mathematics Sample Paper-3

  • question_answer
    Sum of first n terms of 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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