For the given data, n=10, X̅ = 20, Y̅ = 40, ∑(X-5)^2 = 100, ∑(Y-20)^2 =160 and ∑(X-5)*(Y-20) = 80. Calculate the correlation coefficient and comment on the validity of data
The combined cost price of Bournvita and Horlicks is Rs. 2000. With Horlicks sold at a 16% profit and Bournvita at a 20% profit, and given that the rati...
The difference between selling an item at an 18 percent loss and at a 14 percent profit is Rs. 1000. At what price should the item be sold to make a pr...
A pen costs Rs. 6 each, and a marker costs Rs. 5 each. A person purchased some pens and markers for a total of Rs. 100. In how many ways could he have b...
Cost price of a bag is Rs.700. The shopkeeper marked it 80% above the cost price and sold it after giving a discount of 25%. If the shopkeeper had sold ...
A trader bought an article for Rs. 3600 and marked it 20% above of its cost price. If he sold it after giving a discount of Rs. 180 then find the profit...
The cost price of two dozen bananas is Rs. 48 after selling 18 bananas at the rate of Rs. 18 per dozen, the shopkeeper reduced to rate of Rs. 12 per doz...
A shopkeeper sells an article for Rs 80 and earns thrice the profit that he would have earned on selling this article for Rs 69. Find the C.P of ...
A loss of 15% is made by selling an article. Had it been sold for Rs.75 more, there would have been a profit of 10%. What would be the selling price of ...
A person buys books at Rs. 300 for 5 and sells them at Rs.740. How many books must he sell in order to earn profit of Rs. 3,520?
A shopkeeper sold a school bag at a profit of 65%. Had he sold the school bag at 35% profit he would have earned Rs.183 less. Find the cost price of the...
