rebecca7415
13.02.2020 •
Mathematics
A traffic light at a certain intersection is green 55% of the time, yellow 10% of the time, and red 35% of the time. A car approaches this intersection once each day. Let Y denote the number of days up to and including the third day on which a red light is encountered. Assume that each day represents an independent trial.
Find P(Y=7)
Find the mean of Y
Find the Variance of Y
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Ответ:
13
Step-by-step explanation:
Let the other integer be x
13× x=169
x=169/13
x=13