Let number of children's ticket at ₦250.00 each = \(x\) ∴ Number of adult tickets at ₦520.00 each = 5\(x\) Then, Total amount of money received from children's tickets = 250\(x\) Total amount of money received from adult tickets = 520(5\(x\)) ⇒ 250\(x\) + 520(5\(x\)) = 171,000 ⇒ 250\(x\) + 2600\(x\) = 171,000 ⇒ 2850\(x\) = 171,000 ⇒ \(x = \frac{171,000}{2850} = 60\) ∴ 60 tickets were sold at ₦250.00 and 300 tickets were sold at ₦520.00