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?
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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
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