SOLUTION: The number of cars arrived at toll plaza in any given hour is a random
variable represented by X. The probability distribution for X is: [5]
X 10 11 12 13 14
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-> SOLUTION: The number of cars arrived at toll plaza in any given hour is a random
variable represented by X. The probability distribution for X is: [5]
X 10 11 12 13 14
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Question 970732: The number of cars arrived at toll plaza in any given hour is a random
variable represented by X. The probability distribution for X is: [5]
X 10 11 12 13 14
P(X) 0.4 0.2 0.2 0.1 0.1
Find the probability that in a given hours:
i) Exactly 14 cars arrives.
ii) At least 12 cars arrives.
iii) At most 11 cars arrive.
You can put this solution on YOUR website! The number of cars arrived at toll plaza in any given hour is a random
variable represented by X. The probability distribution for X is: [5]
X 10 11 12 13 14
P(X) 0.4 0.2 0.2 0.1 0.1
Find the probability that in a given hours:
i) Exactly 14 cars arrives.
P(X = 14) =
ii) At least 12 cars arrives.
P(X ≥ 12) = P(X = 12) + P(X = 13) + P(X = 14)
=0.2 + 0.1 + 0.1
=
iii) At most 11 cars arrive.
P(X ≤ 11) = 1 - P(X ≥ 12)
= 1 - 0.4
=
