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    				| 1. | 
                                    There are 5 different boxes and 7 different balls. All the balls are to be distributed in the 5 boxes placd in a row so that any box can receive any number of balls. In how many ways can these balls be distributed so that box 2 and box 4 contain only 1 and 2 balls respectively? | 
                            
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Answer»  5522  | 
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