I am rather confused if the probability the .8 and the other is .4 then should the other one not be .32? Anyways maybe this has something to do with them not being disjoint.Originally Posted bytdvc006

This is what you want:

1)First Starts Second Does Not

2)First Does Not Second Does

3)First Starts Second Starts

The probability of Not Car one is .2

The probability of Not Care two is .6

Thus, the probability of 1) is (.8)(.6)=.48

Thus, the probability of 2) is (.2)(.4)=.08

Thus, the probability of 3) is (.30) =.30

Add them up to get, 86%