31. On Family Day, attendance at the baseball game set a record. A reporter for the local paper asked how many adults had paid to see the game. The box office reported that exactly 450 tickets had been sold, and $2,000 was collected. If adults' tickets were $5 and children's tickets were $3, how many adults' tickets were sold?

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

Assuming x tickets are sold for adults, then 450-x tickets for children are sold. Multiply the corresponding quantity by the corresponding unit price and add it up, which is equal to 2000, so an equation about x is obtained, and the solution is x=325. Choose C.