Let a * * * take x times (5-3)x=6.

2x=6

X=3 times

So it turns out that table tennis and badminton each have 5× 3 = 15 (table tennis once 5 times, * * * 3 times).

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Badminton can also be counted, that is, take three at a time, and after three times, there are only six left.

6× 3+6 = 9+6 = 15 results.