Homework Answers
SOLUTION :
P(x < 55)
= p(z < (55 - 63)/5)
= P(z < - 1.6)
= 0.9452 (from cumulative ND table)
So,
Of 200 cars, number of cars travelling at lower than 55 mph
= 200 * 0.0548
= 10.96
= 11 cars (ANSWER).
Add Answer to:
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