What is the ratio between the average number of Samsung mobiles used from 2012 to 2015 to that of th......

Number of people (in lakh) using three different brands of mobile phones over the years.

What is the ratio between the average number of Samsung mobiles used from 2012 to 2015 to that of the average number of Apple mobiles used over the years?

Explanation :
The average number of Samsung mobiles used from 2012 to 2015=20+15+10+5/4 = 50/4
The average number of Apple mobiles used over the years = 15+5+10+25+10+25 = 90/6
Ratio = 50/4 : 90/6 = 5:6

By: Pranav Gupta