Question
1. Assume that 74% of randomly selected adults have a credit card ( based on an AARP Bulletin survey). a) If 5 adults are randomly
1. Assume that 74% of randomly selected adults have a credit card ( based on an AARP Bulletin survey).
a) If 5 adults are randomly selected, what is the probability that exactly four of them have a credit card? {Round to nearest four decimal places.}
b) If 5 adults are randomly selected, what is the probability that at least one of them has a credit card? {Round to nearest four decimal places.}
c) Explain why the answer in part (b) is not valid if applied to five adults friends who are vacationing together?
2. On a multiple choice test with 22 questions, each question has four possible answers, one of which is correct. For students who guess at all answers, find the standard deviation ( rounded to the nearest 3 decimal places).
Step by Step Solution
There are 3 Steps involved in it
Step: 1
![blur-text-image](https://dsd5zvtm8ll6.cloudfront.net/includes/images/document_product_info/blur-text-image.webp)
Get Instant Access with AI-Powered Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
![blur-text-image](https://dsd5zvtm8ll6.cloudfront.net/includes/images/document_product_info/blur-subtext-image.webp)
Step: 3
![blur-text-image](https://dsd5zvtm8ll6.cloudfront.net/includes/images/document_product_info/blur-subtext-image.webp)
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started