MCQOPTIONS
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				| 1. | 
                                    The difference between the total number of students using smartphones of Samsung combined together and the total number of students using smartphones of Sony taken together is | 
                            
| A. | 20 | 
| B. | 60 | 
| C. | 80 | 
| D. | 40 | 
| Answer» C. 80 | |