SOLUTION: If i drive through 3 sets of traffic lights and the probablity of any one being green is 0.3 and the probability of one not being green is 0.7 how do i find what the probability of

Algebra ->  Probability-and-statistics -> SOLUTION: If i drive through 3 sets of traffic lights and the probablity of any one being green is 0.3 and the probability of one not being green is 0.7 how do i find what the probability of      Log On


   



Question 99789: If i drive through 3 sets of traffic lights and the probablity of any one being green is 0.3 and the probability of one not being green is 0.7 how do i find what the probability of all being green and the probability that at least one light will not be green? Also how do i calculate the theoretical probability that all three sets of lights will be green.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
If i drive through 3 sets of traffic lights and the probablity of any one being green is 0.3 and the probability of one not being green is 0.7
--------------------------------------
how do i find what the probability of all being green?
= 0.3^3 = 0.027
---------------------
and the probability that at least one light will not be green?
= 1 - P(all are green) = 1-0.027 = 0.973
-----------------------
Also how do i calculate the theoretical probability that all three sets of lights will be green.
You multiply 0.3*0.3*0.3 to get 0,027
==============
Cheers,
Stan H.