Question
An article is initially marked at 40% above its cost
price. It is then sold after applying two successive discounts - one of 12% and another of Rs. 56. If the final selling price of the article is Rs. 560, determine its cost price.Solution
Let the cost price of the article = Rs. '100x'Marked price of the article = 100x X 1.4 = Rs. '140x'Price after first discount = 140x X 0.88 = Rs. '123.2x'Final selling price = 123.2x - 56 = Rs. 560So, 123.2x = 560 + 56 = 616So, x = 616 ÷ 123.2 = 5And so, cost price of the article = 5 x 100 = Rs. 500
Relation R(A,B,C,D,E) has {AB`->` C, C`->` D,B`->` EA} FUNCTIONAL DEPENDENCY
Find the candidate key of the relation.
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