Let’s assume x number of adults and 2200-x kids went to the expo.
Admission charges to the Expo would amount to 4x + (2200-x) (1.5) = 5050
Simplifying this equations, we get 2.5x + 3300 = 5050
2.5x = 1750
X= 700 adults
And hence 1500 Kids Answer
****