Question is 4 out of 5 teens carry a wireless device.
If 3 teens are randomly selected, find the following probabilities:
A) - None of the teens have a wireless device. ANS is .2
B) - at least one has a wireless device ANS is .8
C) - all 3 have wireless devices. ANS is .512
A) I put 1/5 X 1/4 X 1/3 and I get .02 What did I do wrong?
B) I am not sure what to do here
C) I am not sure what to do here.
I am having trouble with stats and the teacher is not that good in explaining, so any help would be great, thanks.