To solve this problem, let's define the variables:
- Let \( x \) be the number of adult tickets sold.
- Let \( y \) be the number of child tickets sold.
Given that:
- The total number of tickets sold is 200: \[ x + y = 200 \]
- The total amount of money collected is $610, with adult tickets costing $5.00 and children tickets costing $2.00: \[ 5x + 2y = 610 \]
Now, looking at the options provided:
- \( x + y = 200 \) \quad and \quad \( 5x + 2y = 610 \) is correct.
- \( x + y = 610 \) \quad and \quad \( 5x + 2y = 200 \) is incorrect.
- \( x + y = 200 \) \quad and \quad \( x + 2y = 610 \) is incorrect.
- \( x + y = 200 \) \quad and \quad \( 5x + y = 610 \) is incorrect.
Thus, the correct system that represents the number of adult and child tickets that Thomas sold is:
\[ \begin{aligned} x + y &= 200 \ 5x + 2y &= 610 \end{aligned} \]
So the answer is the first option.