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3. The ages of participants in a drama workshop are normally distributed with mean 18.5 years and standard deviation 2.5 years. What is the probability that the age of a random participant is (a) more than 20 years: (b) between 16 and 18 years? 4. The lifetime of a light bulb is normally distributed with mean 800 hours and standard deviation 50 hours. A random light buib is selected. What is the probability that it will last for more than 950 hours? 5.The length of a ball pen is known to be normal with mean 5 inches with a standard deviation of 0.1 inch. Desiree bought one of such ball pen. What is the probability that its length is between 4.85 inches to 5.10 inches.

3. The ages of participants in a drama workshop are normally distributed with mean 18.5 years and standard deviation 2.5 years. What is the probability that the age of a random participant is (a) more than 20 years: (b) between 16 and 18 years? 4. The lifetime of a light bulb is normally distributed with mean 800 hours and standard deviation 50 hours. A random light buib is selected. What is the probability that it will last for more than 950 hours? 5.The length of a ball pen is known to be normal with mean 5 inches with a standard deviation of 0.1 inch. Desiree bought one of such ball pen. What is the probability that its length is between 4.85 inches to 5.10 inches.

A First Course in Probability (10th Edition)
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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3. The ages of participants in a drama workshop are normally distributed with mean 18.5 years and standard deviation 2.5 years. What is the probability that the age of a random participant is (a) more than 20 years: (b) between 16 and 18 years? 4. The ifetime of a light bulb is normally distributed with mean 800 hours and standard deviation 50 hours. A random light bulb is selected. What is the probability that it will last for more than 950 hours? 5.The length of a ball pen is known to be normal with mean 5 inches with a standard deviation of 0.1 inch. Desiree bought one of such ball pen. What is the probability that its length is between 4.85 inches to 5.10 inches.
Transcribed Image Text:3. The ages of participants in a drama workshop are normally distributed with mean 18.5 years and standard deviation 2.5 years. What is the probability that the age of a random participant is (a) more than 20 years: (b) between 16 and 18 years? 4. The ifetime of a light bulb is normally distributed with mean 800 hours and standard deviation 50 hours. A random light bulb is selected. What is the probability that it will last for more than 950 hours? 5.The length of a ball pen is known to be normal with mean 5 inches with a standard deviation of 0.1 inch. Desiree bought one of such ball pen. What is the probability that its length is between 4.85 inches to 5.10 inches.
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