medium · GMAT Quant
The lockers in a school corridor are numbered consecutively from 1 to 36. Exactly three of the lockers will be selected, and the order of selection does not matter.
How many different selections of the three lockers have the property that at least one of their numbers is a multiple of 3?
- 220
- 3,312
- 5,116
- 6,920
- 30,696
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