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Question
karim has 40% more stamps than rahim . If he gives 45 of his stamps to Rahim will have 10% more stamps than karim . How many stamps did karim begin with ?
175
200
220
245
ANSWER : 4
Descrption
<p>ধরি, রহিমের আছে x টি</p> <p>করিমের আছে ( x + x এর 40/100) টি</p> <p> = ( x + 2x/5) টি</p> <p> = ( 7x/5) টি। </p> <p>( x + 45) - ( 7x/5 - 45) × 10/100 = ( 7x/5 - 45) </p> <p>10x + 450 - 7x/5 + 45 = 14x - 450</p> <p>4x + 7x/5 = 945</p> <p>20x + 7x = 945 × 5 </p> <p>x = 945 × 5 / 27</p> <p>x = 175</p> <p>করিমের stamp সংখ্যা = 175 × 7 / 5 = 245 </p>
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