Find expected value of number of days the car encounters

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Reference no: EM13305777

A particularly long traffic light at an intersection is green 20% of the time. A car approaches this intersection once each day. Let X represent the number of days the car encounters a green light. Assume that each day represents an independent trial:

a)Find the probability that the light is green on exactly three days over a ten day period.

b)Find the probability that the light is green on at least three days over a ten day period.

c)Find the expected value of the number of days the car encounters a green light over a ten day period.

d) Find the standard deviation of the number of days the car encounters a green light over a ten day period.

Reference no: EM13305777

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