Question
A shopkeeper bought an article and marked it at Rs. 900.
By selling the article at a discount of 4%, he earns a profit of 20%. Find the cost price of the article.Solution
Marked price of the article = Rs. 900 Selling price of the article = 0.96 × 900 = Rs. 864 So, cost price of the article = 864/1.2 = Rs. 720
Two random variables x and y have the following regression equations -
3x + 2y – 26 = 0
6x + y – 31 = 0
then, the mean values o...
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