When an adult is randomly selected, there is an 85% chance that this person knows what Twitter is. Find the probability that exactly three out of any five randomly selected adults know of Twitter.

My account
Edit my Profile
Private messages
My favorites

Ask a Question
Questions
Unanswered
Tags
Categories
Ask a Question

asked Sep 23, 2019 57.1k views

4 votes

When an adult is randomly selected, there is an 85% chance that this person knows what Twitter is. Find the probability that exactly three out of any five randomly selected adults know of Twitter.

Mathematics
college

Nikhil Vadoliya asked

by Nikhil Vadoliya

8.4k points

0 Comments

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

3 votes

This can be solved by using the binomial distribution, as follows:

$P(3\ out\ of\ 5)=5C3*(0.85)^(3)*(0.15)^(2)=0.1382$
The answer is: 0.1382 to 4 decimal places.

Mike Sickler answered Sep 30, 2019

by Mike Sickler

7.7k points

0 Comments

Please log in or register to add a comment.

Ask a Question

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

8.7m questions

11.3m answers

0 Comments

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

0 Comments

Please log in or register to add a comment.

Other Questions