Answer: 50 students attended the play.
Explanation:
Let x be the number of student tickets sold and y be the number of adult tickets sold. We know that:
x + y = 300 (total number of tickets sold)
5x + 11y = 3000 (total revenue from ticket sales)
We can use the first equation to solve for one of the variables in terms of the other. For example, we can substitute y = 300 - x into the second equation:
5x + 11(300 - x) = 3000
5x + 3300 - 11x = 3000
-6x = -300
x = 50