১৯৭৮৫
The amount of time that three secretaries worked on a special project are in the ratio of 1 to 2 to 5. If they worked a combined total of 112 hours, how many hours did the secretary, who worked the longest spend on the project?
উত্তর
70
১৯৭৮৭
A retail appliance store priced a video recorder at 20 precent above the wholesale cost of Tk. 200. If a store employee applied the 10 percent employee discount to the retail price to buy the recorder, how much did the employee pay for the recorder?
উত্তর
Tk. 216
১৯৭৮৯
A bag contains 7 red, 9 yellow and 3 black balls. If a ball is picked at random, what is the probability that the ball drawn will be either a red of a black ball.
উত্তর
10/19