There are 3 ways to explain the population in a country interested in football.
1 Probability Distribution
2 Set Theory
3 Number Theory
Today we will take the first approach that of probability distribution.
Given premises is that in a set theory 5 out of 7 are in the probability distribution of population who are interested in sports.The population who is not interested in sports is 1-5/7=2/7.
The percentage of population interested in football is 1 out of 7.Thus 5/49 is the population who is interested in football.Thus the probability distribution of football in sports is 5/49=0.1 of 0.7.
0.1/0.7=1/7 that means out of 100 people interested in sports 70 are interested in football.