Final answer:
500 children and 500 adults bought tickets for the movie.
Step-by-step explanation:
To solve this problem, let's assume that x represents the number of children and y represents the number of adults who bought tickets for the movie. We can create a system of equations based on the given information:
- x + y = 1000 (equation 1, because the total number of people who attended the screening was 1000)
- 4x + 10y = 7000 (equation 2, because the total amount collected from ticket sales was $7000)
We can solve this system of equations by substitution or elimination method. Let's use the elimination method:
- Multiply equation 1 by 4: 4x + 4y = 4000
- Subtract equation 2 from the modified equation 1: (4x + 4y) - (4x + 10y) = 4000 - 7000
- -6y = -3000
- Divide both sides by -6: y = 500 (number of adults)
- Substitute the value of y into equation 1: x + 500 = 1000
- x = 500 (number of children)
Therefore, 500 children and 500 adults bought tickets for the movie.