Answer:
150 children attended the fair that day
Step-by-step explanation:
Let n represents the number of children attended.
Since there were 350 people attended, the number of adults is 350-n
Since the cost of admission is $3 per adult, the admission fee gained by adults is:
→ 3(350-n) (1)
Since the cost of admission is $2 per child, the admission fee gained by children is:
→ 2n (2)
Since the total admission fees were $900, the total of 1 and 2 must be equal to 900
→ 3(350-n) + 2n = 900
→ 1050 - 3n + 2n = 900
→ n = 150
