Question 346752
Use 30C15, unless the tickets have designated seating in which case you can use 30P15.

Do you know the difference between combination and permutation?


If so, then you do not need the formulas, right?


In any case, you can find the formulas at the following link:


http://www.regentsprep.org/Regents/math/algtrig/ATS5/Lcomb.htm


I'll let you take it from here.