Question

某旅行社组去外地旅游,30人起组团,每人单价800

Answer 1

设旅行团有x人,则每人单价为800-10(x-30),因此营业额为

x(800-10x+300)=-10x^2+1100x=30250.

即(x-55)^2=0.所以x=55.