Question

I need the answers for #3 and #4

Answer 1

See below

Explanation:

3) Radius of shaded circle=1.5 units

Area of shaded circle=pi*1.5^2=2.25*pi=7.0686

Area of big circle=pi*5^2=25pi=78.54

Divide the two together: 7.0686/78.54=0.09 so exactly 9% is the probability

4) Area of whole rectangle: 8*5=40

Area of unshaded region: (2*3)+(2*2)/2=6+4/2=6+2=8

40/8=5, so there's a 5 to 1 chance.