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Permutations and Combinations - Data Intensity 1 :: Discussion
| 39. | A group of 10 representatives is to be selected out of 12 seniors and 10 juniors. In how many different ways can the group be selected if it should have at least one senior? | |
| A. | ²²C?? | |
| B. | ²²C?? + 1 | |
| C. | ²²C? + ¹?C? | |
| D. | ²²C?? – 1 | |
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