MCQOPTIONS
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				| 1. | 
                                    Find 'X' in the circuit below:f1(A, B, C, D) = Σ(6, 7, 13, 14);f2(A, B, C, D) = Σ(3, 6, 7);f3(A, B, C, D) = Σ(5, 6, 7, 14, 15) | 
                            
| A. | ‚àè(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15) | 
| B. | 0 | 
| C. | Σ(14) | 
| D. | 1 | 
| Answer» D. 1 | |