Monique drew a square and inscribed circle on a sheet of paper, as shown below
(the picture shows a square with a circle in it and the measures are 16cm by 16cm)
monique randomly drops a pen point-down to leave a mark on the drawing. what is the probability, expressed in percent, that the pen mark will land inside the square, but outside the circle?
a) 80.38%
b) 78.50%
c) 33.33%
d) 21.50%
pls me and explain how you got it.