In a Survey of 200 Households Regarding the Ownership of Desktop

question 40

Short Answer

In a survey of 200 households regarding the ownership of desktop and laptop computers, the following information was obtained:
​
110 households own only desktop computers.
​
10 households own only laptop computers.
​
50 households own neither desktop nor laptop computers.
​
How many households own both desktop and laptop computers?
​
__________ households

---

Definitions:

Blackout

Blackout means a temporary loss of electricity or the intentional suppression of information or broadcasting.

Worm

A type of malware that replicates itself to spread to other computers, often utilizing a network, without needing to attach to an existing program for distribution.

Trojan

A type of malware disguised as legitimate software that can gain access to systems and cause damage or steal information.

Network

A collection of interconnected computers and devices that share resources and data.