SOLUTION: A survey showed that the ratio of telephones to people in the world was 1 : 8 .of the worlds telephones 0.012% were in Ethiopia . In Ethiopia 0.2 % of the population had telephones

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: A survey showed that the ratio of telephones to people in the world was 1 : 8 .of the worlds telephones 0.012% were in Ethiopia . In Ethiopia 0.2 % of the population had telephones      Log On


   

Question 252302: A survey showed that the ratio of telephones to people in the world was 1 : 8 .of the worlds telephones 0.012% were in Ethiopia . In Ethiopia 0.2 % of the population had telephones . At the time of the survey there were 4000 million people in the world. What was the population of Ethiopia?
Answer by richwmiller(17219) About Me  (Show Source):
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one in eight of the world had telephones
4000*10^6 world population
500*10^6 in the world have phones
.00012*500*10^6 number of phones in Ethiopia =.06 *10^6
.002*x=.06*10^6
x=.06*10^6/.002=30*10^6=30 million people in Ethiopia.