Question

SAT QUESTION HELP

Answer 1

Three years ago men made up two out of every three internet users in America. Today the ratio of male to female users is about 1 to 1. In that time the number of American females using the internet has grown by 30,000,000, while the number of males who use the internet has grown by 100%. By how much has the total internet-user population increased in America in the past three years?

Answer 2

I want to learn how to solve these types of questions :) thanks

Answer 3

i got 50 million? O.o

Answer 4

how?

Answer 5

let three years back population of women users=x
'' '' '' '' '' men ''=2x
now '' ''=4x
'' '' ''=x+30,000,000
but no of men internet users=no. of women internet users
4x=x+30,000,000
4x-x=30,000,000
3x=30,000,000
x=10,000,000
total population of internet users=4x+x+30,000,000=5x+30,000,000,
=50,000,000+30,000,000=80,000,000
3 years back population of internet users=x+2x=3x=3*10,000,000=30,000,000
increase=80,000,000-30,000,000=50,000,000

Answer 6

oooh thanks so much:D

Answer 7

yw