There are 250 students taking either band or chorus. if there are 180 students taking band and 60 students in both mad and chorus, how many students are only in chorus

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.