Question

A trader sells rice to customers at a profit of 20%. But to his regular customers he charges a profit of only 10%. If he makes an overall profit of 18.18%, what fraction of his customers are regular customers?

Answer 1

Answer:

18.2% or 91/5

Step-by-step explanation:

Taking total customers as 100.

ordinary as N

regular as (100-N)

by using formula of weighted mean

(20n + 10(100-n))/100= 18.18

solving the above we get the answer