The mean was given to be  ? = 11  and  x0 was determined to be 11. Substitute these values into the formula for the cumulative probability to find the probability that arrival time between vehicles is 11 seconds or less, rounding the result to four decimal places. P(x ≤ x0) = 1 − e−x0/? P(x ≤ x0) = 1 − e(-11/11) P(x ≤ x0) = ?

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