Question 330456
let number of  children be x
number of adults will be 600-x
..
child ticket = 200
adult ticket = 500
..
200x+500(600-x)=240,000
200x+300000-500x= 240,000
-300x=240000-300000
-300x=-60000
x= 200 children

I think the receipts should be 240, 000. I have worked on that basis