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| 1. |
Let A={3,6,9,12,15,18,21} B={4,8,12,16,20} C={2,4,6,8,10,12,14,16} and D={5,10,15,20} Which of the following is incorrect? I. A-B={4,8,16,20} II. (C-B)nn(D-B)=phi III. B-CneB-D |
| Answer» Answer :A | |