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    				| 1. | 
                                    If a person is permitted to select at least one and at most n coins from the collection of (2n +1) different coins. If the total number of ways in which he can select coins is 255 find the value of n | 
                            
| Answer» If a person is permitted to select at least one and at most n coins from the collection of (2n +1) different coins. If the total number of ways in which he can select coins is 255 find the value of n | |