The porosity of Wara formation is normally distributed with a mean of 18% and a standard deviation of 4%. a) What is the probability that a core sample will have a porosity between 26 and 28 %? b) What is the probability that a core sample has a porosity of at least 20%? c) If five core samples selected at random, find the probability that all these cores will have porosity more than 47.6%? comment on your answer.

The porosity of Wara formation is normally distributed with a mean of 18% and a standard deviation of 4%. a) What is the probability that a core sample will have a porosity between 26 and 28 %? b) What is the probability that a core sample has a porosity of at least 20%? c) If five core samples selected at random, find the probability that all these cores will have porosity more than 47.6%? comment on your answer.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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