Given P(A0 = .4 and P(B) = .2 and the P(A and B) = 0, what is the probability of A or B> A: .2
B: .6
C: 0
D: 1

.2 would be the correct answer I believe.

Step-by-step explanation:

Probability of A or B Independent

Formula for the probability of A and B (independent events): p(A and B) = p(A) * p(B). If the probability of one event doesn't affect the other, you have an independent event. All you do is multiply the probability of one by the probability of another.

If i'm wrong please don't say anything I haven't learned this stuff yet. :)

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.