Question

Seven out of every eight students surveyed owns a bike the difference between the numbers of students who own a bike and those who do not is 72 how many students were surveyed

Answer 1

96 students were surveyed

Explanation:

Proportions

Variables are proportional if one of them can be obtained as the other by a constant number.

Let's suppose a number of x students were surveyed. Seven out of every eight students own a bike. It means that

`(7)/(8)x` surveyed students own a bike

`(1)/(8)x` surveyed students do not own a bike

The difference between both quantities is

`(7)/(8)x-(1)/(8)x=(6)/(8)x=(3)/(4)x`

We know that number is 72

`(3)/(4)x=72`

`x=96`

Answer: 96 students were surveyed (84 of them own a bike, 12 don't)