Question

A study showed that the ratio of the number of people who get their news from print sources to the number of people who get their news from social media sources is 3:7. Based on the ratio, how many people in a town of 900 people get their news from social media sources? 

Answer 1

Number of people which get their news from social media sources:

$N=\frac{900}{3+7}*7=630.$