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Answer:
22.3 minutes
Step-by-step 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