Question

Select the correct answer.

Tickets to a concert cost $2 for children and $5 for adults. If 630 people attended the concert and the ticket sales totaled $2,910, how many children attended the concert?

A.
36

B.
50

C.
80

D.
120

Answer 1

Answer: C 80

Solution

x=Children ticket

y=Adult ticket

x + y = 630

y = 630 - x

2x + 5y = 2910

Then, we replace the value of y with the previous answer

2x + 5y = 2910

2x + 5(630 - x) = 2910

2x + 3150 - 5x = 2910

- 3x = 2910 - 3150

- 3x = - 240

x = 240/3

= 80

The number of children attending the concert is 80.