a man bought a number of orange at 3 for taka and..., Profit and Loss, General Mathematics

Question:A man bought a number of orange at 3 for a taka and an equal number at  2 for a taka. At what price per dozen should he sell them to make a profite of 20%?

A Tk 4 
B Tk 5 
C Tk 6 
D Tk 7

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+ AnswerC

+ ExplanationSuppose, he bought 1 dozen oranges of each kind 
C.P of 2 dozens = Tk `(1/3 xx 12 + 1/2xx12)` = Tk 10
profit = 20 %
`:.` S.P of 2 dozens = 120 % of Tk 10
   = Tk `((120)/100 xx 10)` = Tk 12
`:.` S. P per dozen = Tk 6

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