There are 5000 buyers of apples, who each on average buy 12 apples a month.
There are two types of apple buyers, those that buy red apples, and those that buy green apples.
The red apple buyers buy an average of 5 a month. The green apple buyers buy an average of 14 a month.
What proportion of the 5000 apple buyers are red apple buyers?
Completely stuck.
I'd really appreciate some help!
Let the number of red apple buyers be x, then those buying green apples are (5000-x). the total number of apples they buy is 5000 *12 = 60,000. This is also equal to the sum of the number of apples that red and green apple buyers buy. Therefore,
x*5 + (5000-x)*14 = 60,000
which gives x = 10,000/9 = 1111.11
You can ignore the .11 as number of people can't be fractional