Example 2

Marquis conducted a survey asking people which of the following devices they own: a smartphone, a tablet, or a laptop. The Venn diagram that follows shows his results. Based on the diagram, determine each of the following: [list] [*]the number of people Marquis surveyed [*]the number of people who own all three devices [*]the number of people who own just a smartphone and a laptop [*]the number of people who own only a tablet, only a laptop, or both a tablet and a laptop [*]the number of people who do not own a tablet [/list] Assume that everyone Marquis asked responded to the survey, and everyone owned at least one of the devices.

[list=1] [*]Determine the number of people Marquis surveyed. [*]Determine the number of people who own all three devices. [*]Determine the number of people who own just a smartphone and a laptop. [*]Determine the number of people who own only a tablet, only a laptop, or both a tablet and a laptop. [*]Determine the number of people who do not own a tablet. [/list] This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit [url="http://www.walch.com"]www.walch.com[/url] for more information on their resources.