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                                    If the marked price of an article is Rs.M, then find the rate at which sales tax is charged if the person pays Rs.M inclusive of sales tax. Discount allowed is `10%`.A. `9%`B. `10%`C. `11(1)/(9)%`D. `9(1)/(11)%` | 
                            
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Answer» Correct Answer - C What per cent of `(9M)/(10)` is M.  | 
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