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

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) (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
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how do i find what the probability of all being green?
= 0.3^3 = 0.027
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and the probability that at least one light will not be green?
= 1 - P(all are green) = 1-0.027 = 0.973
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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
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Cheers,
Stan H.

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