3. According to a survey in a country 25 % of all houscholds are wircless only houscholds(no landlinc). In a random samplc of 20 houscholds, what is the probability that a. Exactly 5 are wireless only? b. Fewer than 3 are wireless only? c. At least 3 are wireless only? d. The number of houscholds that arc wircless only is betwcen 5 and 7, inclusive?
3. According to a survey in a country 25 % of all houscholds are wircless only houscholds(no landlinc). In a random samplc of 20 houscholds, what is the probability that a. Exactly 5 are wireless only? b. Fewer than 3 are wireless only? c. At least 3 are wireless only? d. The number of houscholds that arc wircless only is betwcen 5 and 7, inclusive?
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...
Related questions
Question
Please
Transcribed Image Text:3. According to a survey in a country 25 % of all houscholds are wircless only houscholds(no landlinc). In a
random samplc of 20 houscholds, what is the probability that
a. Exactly 5 are wireless only?
b. Fewer than 3 are wireless only?
c. At least 3 are wireless only?
d. The number of houscholds that arc wirclcss only is betwecen 5 and 7, inclusive?
Hint: Use Binomial Probability Distribution
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 5 steps
Recommended textbooks for you
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON