Question

Desiree is analyzing the results of a study that suggests 70% of high school seniors tweet, 85% text, and 62% both tweet and text. According to her research, there are about 3.5 million high school seniors.
What is the probability that a randomly chosen high school senior does text but does not tweet?

Answer 1

Answer:

0.23 = 23%

Step-by-step explanation:

To find the percentage of high school seniors that text but does not tweet, we just need to get the percentage of them that text and subtract by the percentage of them that text and tweet. So we will have that:

P(text and not tweet) = P(text) - P(text and tweet) = 0.85 - 0.62 = 0.23

So the probability of a random high school senior text and not tweet is 0.23 = 23%