We are required to calculate the number of students that bought cheese pizza
Total students that purchased pizza = 280
pepperoni pizza = 39%
= 39 / 100 × 280
= 0.39 × 280
= 109.2
hamburger pizza = 26%
= 26/100 × 280
= 0.26 × 280
= 72.8
Cheese pizza = x
Total pizza = pepperoni pizza + hamburger pizza + Cheese pizza
280 = 109.2 + 72.8 + x
280 = 182 + x
280 - 182 = x
98 = x
Therefore,
The number of students who bought cheese pizza are 98 students
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