Question

A total of

Answer 1

Let x be the number of adult tickets sold, such that 2x is the number of student tickets sold.

2x + x = 384, since the number of adult and student tickets add up to the total number of tickets.
3x = 384
x = 128

So, there are 128 adult tickets, leaving 256 student tickets sold.

Answer 2

I believe it is 128. I may be wrong but if there are 384 tickets sold and there were 2 times more student tickets sold than adult then there are 128 tickets lift over to be adult tickets