Question

A survey found that 15 out of 100 people have blue eyes.



On the basis of this survey, how many people in a group of 5000 are likely to have blue eyes?

Answer 1

15/100 = x /5000 [Set up as a ratio, sorry can't figure out the equation device on here!]
.15 = x/5000
.15(5000) = x
750 = x

Answer 2

Just use the relation
15/100 = x/5000 where x is the no. of people having blue eyesin a group of 5000 people
x = 5000 x 15/100 = 750