${\mathrm{a}}_1,{\mathrm{a}}_2,{\mathrm{a}}_3\dots {\mathrm{a}}_{\mathrm{n}}\text{ are in A.P such that }{\mathrm{a}}_{\mathrm{n}}=100,{\mathrm{a}}_{50}-{\mathrm{a}}_{49}=3/5\text{ then }{15}^{\text{th }}\text{ term of A.P from the end is}$

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