Answer
0.30854
Work Step by Step
μ = 45000 σ = 2000 miles
$P(x \geq 46000)$ : z = $\frac{46000-45000}{2000}$ =$P(z \geq 0.5)$ = 0.3085
The probability that all four tires for her car will last at least 46,000 miles = 0.30854
Introductory Statistics 9th Edition
by Mann, Prem S.
Published by
Wiley
ISBN 10:
1-11905-571-7
ISBN 13:
978-1-11905-571-6
Chapter 6 - Advanced Exercises - Page 264: 6.63
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