3 balls are drawn randomly from a bag contains 3 black, 5 red and 4 blue balls. What is the probability that the balls drawn contain balls of different colors?
A vendor fixed Selling Price of a product at 40% above the cost price. He sells half the stock at this price, one-quarter of that stock at a discount of 25% on the original selling price and rest at a discount of 30% on the original selling price. Find the gain percentage all together?
An agent gets a commission of 2.5% on the sales of cloth. If on a certain day, he gets Rs.12.50 as
commission, the cloth sold through him on that day is worth
a) Rs.250 b) Rs.500 c) Rs.750
d) Rs.1250 e) None of these
A Students was asked to find the arithmetic mean of the numbers 3, 11, 7, 9, 15, 13, 8, 19, 17,
21, 14 and x. He found the mean to be 12. What should be the number in place of x?
a) 3 b) 7 c) 17
d) 31 e) None of these
A, B and C start a business. Profit earned by A is 10% more than B and profit earned by B is 15% less than C. The ratio of their investment is
(a) 178:170:200
(b) 187:170:200
(c) 180:162:190
(d) 163:175:190