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31-07-2024
Mathematics

Answered

Suppose the average streets width is in a neighborhood of Riyadh are normal distributed with mean 18 m and variance 9 m . We measure randomly astreet of this neighborhood Then:
a) Calculate the probability that the width of a street in this neighborhood greater than 21.5 m ?
b) What is the probability that the width of a selected street is not exceed the mean value by more than 1.5×σ ?

Answer :

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