Question

A traffic signal displays green light for 3 min to allow passage of traffic on a particular road . if the signal is currently displaying green light , then find probability that it will turn red within the next half a minute

Answer 1

Ans : 0.5min/3 min
=1/6
=16.66%

Answer 2

The probability that it will turn red within the next half a minute would be 1/6.

Given the total time duration for the signal to change from green light to red light is 3 minutes. This is represented as E2

Again, the needed time duration for the signal to change from red to green is 0.5 minutes. This is represented as E1.

So, the probability that it will turn red within the next half a minute will be (E1/E2)

= (0.5/3)

= 1/6