A sells an article to B at 10% profit. B sells it to C at 25% profit. If C pays ₹6,875 for it, then the price at which A bought it is:

₹5,000

                         A                                    B                                                   c

Cost Price -   200 ----10%profit  -------  220   --------25%profit -----------  275   

                       ⇓                                                                                            ⇓   

                    × 25                                                                                      × 25     

                       ⇓                                                                                            ⇓

                     5000                                                                                    6875 (Given)