Question
The two regression lines are 12X+8Y=104 and 24X+12Y=124.
Find the correlation coefficient.Solution
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A shopkeeper earns a profit of 30% by selling an article. What would be the approximate percent change in the profit percent, if he had paid 20% less an...
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Two items, ‘X’ and ‘Y’, were each sold for Rs. 2500. Item ‘X’ was sold at a 20% loss, while Item ‘Y’ was sold at a 25% profit. If the av...
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Marked price, selling price and cost price of an article are in the ratio 10:7:5. If difference between marked price and cost price of an article is Rs....
A shopkeeper purchases rice of two varieties ‘A’ and ‘B’ at Rs. 18 per kg and Rs. 45 per kg respectively. He mixes 1 kg of variety ‘A’ rice ...
A shopkeeper purchases an article at a 30% discount on the marked price and sells it at a 50% profit on the cost price. If his profit amounts to ₹840,...
The profit earned when an article is sold for Rs. 1,800 is the same as the loss incurred on selling it for Rs. 1,000. Find the selling price of the arti...
