medium · GMAT Quant
On the night shift, willow Ledger has 48 staff: 22 in X, 20 in Y, 15 in Z. Pairwise overlaps (including the triple) are 6, 6, and 5, and 3 are in all three.
How many are in at least one group?
- 5
- 57
- 40
- 43
- 17
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