a trader bought the number of articles for 900 rupees 5 articles that damage he sold each of the remaining articles at rupees to more than what he had paid for it and got a trader bought the number of articles for 900 rupees 5 articles that damage he sold each of the remaining articles at rupees to more than what he had paid for it and got a profit of Rs 80 on the whole whole product find the number of article he bought?
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let the total no of aarticles be n
let the value of one article ne a
given:
na=900
a=900/n
(n-5)*(a+2)=980
na-5a+2n=990
900-5(900/n)+2n=990
2n-4500/n=90
n2-2250=45n
n2-45-2250=0
n(n-75)30(n-75)
(n+30) (n-75)
n=-30 n=75
sine the no of arrticles cannot be in negative
the answer is 75:
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