At a school’s cafeteria, 60 students ordered lunches. Every student ordered at least one lunch, and some took two. 55 took chicken lunches and 45 took fish lunches. How many took both lunches?

Iwill give brainliest. suppose tommy walks from his home at (0, 0) to the mall at (0, 5), and then walks to a movie theater at (6, 5). after leaving the theater tommy walks to the store at (6, 0) before returning home. if each grid square represents one block, how many blocks does he walk?