Respuesta :

5 people times 3 tickets each
5 times 3 = 15

15 tickets in all
So basically you want to say,

five people who each bought 3 tickets

Or, 

five groups of 3 tickets.

So five groups of 3 tickets would be,

3 + 3 + 3 + 3 + 3,

or 3 * 5.

3 * 5 = 15.
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