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OpenStudy (anonymous):
There are 9 balls in a hat. The balls are numbered 1-9. You need to choose 3 of the balls. How many possible combinations are there?
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OpenStudy (sidmanfu):
123 456 789 147 258 369
OpenStudy (sidmanfu):
there are too many possible combanations lol
OpenStudy (madhu.mukherjee.946):
9c3
OpenStudy (anonymous):
thanks!
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