In: Statistics and Probability
Expect that a connection has a lossy tendency of 10% and that packet losses are independent. Assume that when a packet gets lost, this is detectable and the packet is re-transmitted until the point that it is accurately received. What is the probability that it would be transmitted precisely one, two, and three times?
Given,
Probability that a packet gets lost : p = 10/100 =0.1
Probability that a packet is received accurately : q = 1-p = 1-0.9
probability that it would be transmitted precisely one, two, and three times
Probability that it would be transmitted precisely one time
=Probability that First time itself that the packet is received accurately
= Probability that the packet is received accurately : q = 0.9
Probability that it would be transmitted precisely one time = 0.9
Probability that it would be transmitted precisely second time
= Probability that First time the packet is lost and Second time the packet is received accurately
=Probability that the packet is lost x Probability that the packet is is received accurately
= pq = 0.1 x 0.9 = 0.09
Probability that it would be transmitted precisely second time =0.09
Probability that it would be transmitted precisely second time = 0.09
Probability that it would be transmitted precisely third time =
Probability that First time the packet is lost and Second time the packet is lost and Third time the packet is received accurately
=Probability that the packet is lost x Probability that the packet is lost x Probability that the packet is received accurately
p x p x q = 0.1 x 0.1 x 0.9 = 0.009
Probability that it would be transmitted precisely third time = 0.009