- #1
jaus tail
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Homework Statement
Assume that in a traffic junction, the cycle of the traffic signal lights is 2 minutes of green
(vehicle does not stop) and 3 minutes of red (vehicle stops). Consider that the arrival time of
vehicles at the junction is uniformly distributed over 5 minute cycle. The expected waiting
time (in minutes) for the vehicle at the junction is __________.
Homework Equations
E(x) = summation of (x) * P(x) over all values of x
The Attempt at a Solution
Adding them all I get answer for expected value as 1 / 25 * (6 + 6 + 6 + 5 + 3 ) = 26/25
Correct answer is 0.9.
How do I solve this?