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If 18 t h and 11 t h term of an A.P. ...

If `18 t h` and `11 t h` term of an A.P. are in the ratio `3\ :2` , then its `21 s t` and `5t h` terms are in the ratio `3\ :2` (b) `3\ :1` (c) `1\ :3` (d) `2\ :3`

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RD SHARMA-ARITHMETIC PROGRESSIONS-All Questions
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