Question

In an opaque bag, there are several discs of different colors (red, green, blue) and different textures (smooth, rough). It is known that when a disc is randomly selected:

P(red)=0.5
P(smooth)=0.8
P(red and smooth)=0.1

A disc is randomly selected and found to be smooth. What is the approximate probability that it is also red?

Answer 1

A)0.2
B)0.1
C)0.125
D)0.40

Answer 2

I believe it's C...

Answer 3

Thanks!!! I don't know how to solve this but I trust you!!