Answer:
22.3 minutes
Explanation:
The computation of the travel time is as follows:
Given that
= 17
And, the standard deviation is 4.5
P(X≤C) = 0.88
P( x -
) ÷
≤ (C -
) ÷
= 0.88
(C -
) ÷
= 1.175
c =
+ 1.175 ×

= 17 + 1.175 × 4.5
= 22.3 minutes
Hence, the travel time is 22.3 minutes