題目誤導人~
6 I( K7 U' T* m" h9 c, uowner 100. w) K- [' g, ]% D& \* r
owner's son 20
- ^! h1 R! {1 U' T8 c0 ?, }! Xeach pay 40
) I& j/ J# B- v; C7 W p J5.39.217.7640*3 = 120tvb now,tvbnow,bttvb& f* A/ I/ Y v& d$ Q+ Z+ B1 c' Q. y
120(3 guys) - 20(owner's son) = 100 (owner) |