The average weight of all the 200 employees in an office is 68.2 kg, where of the employees are ladies and the ratio of the average weight ofa man to that of a woman is 7 : 5. Find the average weight of the female employees.
The population ofa town is increasing at the rate of 10% per year. If the present population of the town is 1,00,000, what will its population be 2 years from now?
Raju sells an object at 20% below its cost price. If he sold it for โน450 more, he would have made a profit of 25%. What is the original selling price of the object?
The ratio of the numbers of boys and girls in a school is 5: 8. If there are 260 smdents in the school, then what is the difference between the numbers of girls and boys in the school?