The high school drama club earned $855 after selling 255 tickets. The student tickets were $1 each, and guest tickets were $5 each.
How many student and guest tickets were sold?

Let the number of students = 2.

Let the number of guests = y.

Option (C) is the incorrect one.

Because product of two irrational numbers is not "Always" irrational.

as in the case below,

√5 × √5 = 5

We arealdy know that √5 is an irrational number, and after multiplying that with another irrational number √5, we got a rational number that is 5.