There are 4 red balls, 5 blue balls and 3 green balls in a jar. 2 balls are drawn at random. Find the probability that both balls are either green or red.
Given 4 red, 5 blue,3 green balls Total possible outcomes (selecting 2 out of 12 balls) =12C2= (12 × 11)/(2 × 1) = 66 Favorable outcomes (selecting 2 out of 4 red balls) =4C2= (4 × 3 × 2)/ (2 × 2 × 1) = 6 Favorable outcomes (selecting 2 out of 3 red balls) =3C2= (3 × 2)/ (2 × 1) = 3 => P(E) = (6 + 3)/66 = 9/66 = 3/22
Cost price of a bag is Rs.600. The shopkeeper marked it 60% above the cost price and sold it after giving a discount of 20%. If the shopkeeper had sold ...
The selling price of 5 bags is equal to the cost price of 8 bags. Find the percentage of profit earned on selling a bag.
A sold a car to B at 4% profit, who later sold it back to A at 2% loss. If initially A purchased the car for Rs. 4,00,000, then find the total profit ea...
A person buys 5 tables and 9 chairs for Rs15,400. He sells the tables at 10% profit and chairs at 20% profit. If his total profit on selling all the tab...
A shopkeeper sold a jacket for Rs. 2500 at a loss of 20%. At what price should he have sold the jacket, to earn a profit of 20%?
The cost price of a laptop and a smartphone is Rs. 60,000 and Rs. 30,000, respectively. The shopkeeper sold the smartphone and the laptop at a loss of 1...
A shopkeeper planned to sell 150 shirts each priced at Rs 1,250 in a particular year. Each shirt, if it had been sold at the mentioned price would have ...
A shopkeeper marked an article P% above its cost price and sold it for Rs. 2160 after giving a discount of 20%. If the ratio of cost price and selling p...
Profit on selling 40 pens equals selling price of 12 books while loss on selling 40 books equals selling price of 16 pens. Also profit percentage equal...
Each of the articles was marked 25% above its cost price and while selling 12% discount was given on it. The cost price of article M is Rs. 500 more tha...
