SOLUTION: A survey showed that the ratio of telephones to people in the world was 1:8. Of the world's telephones 0.012% were in Ethopia . In ethopia 0.2% of the population had telephones. At
Question 209151This question is from textbook Longman mathematics for IGCSE book 1
: A survey showed that the ratio of telephones to people in the world was 1:8. Of the world's telephones 0.012% were in Ethopia . In ethopia 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 Ethopia?
I an having great problem solving this question. Therefore I request you to help me.It is really urgent! Thankyou very much indeed. This question is from textbook Longman mathematics for IGCSE book 1
You can put this solution on YOUR website! A survey showed that the ratio of telephones to people in the world was 1:8.
Of the world's telephones 0.012% were in Ethopia.
In ethopia 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 Ethopia?
;
let p = population of Ethiopia
:
Find out how many telephones in the world (in millions)
: *4000 = 500 million telephones
:
It says,"the world's telephones 0.012% were in Ethiopia." therefore
Change .012% to decimal
.00012 * 500,000,000 = 60,000 telephones
:
It says,"In Ethiopia 0.2% of the population had telephones.", therefore:
Change .2% to decimal
.002p = 60000
p =
p = 30,000,000 people
