Need help with math

In a survey of 250 households regarding the ownership of desktop and laptop computers, the following information was obtained: ​
130 households own only desktop computers. 30 households own only laptop computers.
50 households own neither desktop nor laptop computers. ​

How many households own both desktop and laptop computers?

1. 0
2. 0
3. 60
1. people who own both (b) will be counted in both groups (laptop owners and desktop owners)

when you count all of the households, the "both" group is only counted once

130 + 30 + 50 + b = 250

1. 0
2. 0
posted by Scott
2. Scott is correct :3

1. 0
2. 0
posted by Lollipops

Similar Questions

1. Algebra

Pauline sells computers on commission. She spends 2 hours on selling a laptop and 1 hour on selling a desktop computer. She works no more than 40 hours per week and routinely sells at least 1 laptop and at least 4 desktops each

asked by Jacob on April 26, 2011
2. Math question word

Milan bought a desktop computer and a laptop computer. Before finance charges, the laptop cost \$350 less than the desktop. He paid for the computers using two different finance plans. For the desktop the interest rate was 7% per

asked by Anonymous on December 10, 2015
3. Math

In a survey of 380 households regarding the ownership of VCRs and DVD players, the following data was obtained: ​ 350 households own one or more VCRs. ​180 households own one or more VCRs and one or more DVD players. ​13

asked by Kal Jay on October 29, 2016
4. statitics

Approximately 40% of all U.S. households own at least one dog (according to the humane society). Suppose 15 households are randomly selected for a pet ownership survey. a. What is the probability that exactly eight of the

asked by Anonymous on October 17, 2010
5. Algebra

I need help solving these three problems. 1/4(7 + 3g) + -g/8 Twice the greater of two consecutive odd integers is 13 less than three times the lesser number. Find the integers. About 4.9 million households had one brand of

asked by Josie on October 27, 2009
6. Education/Technology

To get instant feedback for assessment, such as physical education fitness, a music lab activity, or reading competency, students have been shown how to use A) scanners or punch cards. B) handheld computers or PDAs. C) desktop or

asked by Lori on February 14, 2013
7. Statisitics

Identify the population, and the sample in each of the following: A small college has 275 tenured full and associate professors. Twenty professors are randomly chosen to take part in a survey about the incorporation of technology

asked by Terri on October 16, 2014
8. English

Identify the statement that is a verifiable fact. A. Kids need to avoid excessive time in front of a computer. B. Laptop computers outsell desktop computers in retail sales.***** C. Most computer applications are designed for

asked by Cassie on May 19, 2015
9. Marketing

The manager of the aluminum recycling division of Environmental Services wants a survey which will tell him how many households in the city of Seattle, Washington, will voluntarily wash out, store, and then transport all of their

asked by Lee on April 20, 2010
10. computers

You have purchased an Apple desktop computer and want to set it up so that you can access your computer desktop when you are on the road. How might you do this? A. Install Remote Desktop for Apple on your desktop. B. Install

asked by brandi on January 15, 2015

More Similar Questions