৫০টি কলা ২০০ টাকায় কিনে ২৫টি কলা ৫০ টাকা দরে বিক্রি করলে শতকরা কত লাভ বা ক্ষতি হবে?

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Job Solution Sonali Bank Ltd Sonali Bank Ltd - Officer 05.11.2010 গণিত
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