The average age of 24 students is 12 years. It was observed that while calculating the average age, the age of a student was taken as 14 years instead of 8 years. What will be the correct average age (in years)?
1). 11.25
2). 11.5
3). 11.75
4). 12.25
A, B and C received an amount of Rs 8400 and distributed among themselves in the ratio of 6 : 8 : 7 respectively. If they save in the ratio of 3 : 2 : 4 respectively and B saves Rs 400, then what is the ratio of the expenditures of A, B and C respectively?
1). 6:08:07
2). 8:06:07
3). 9:14:10
4). 12:07:09
Kanchan bought a clock with 25% discount on marked price. She sold it with 75% gain on the price she bought. What was her profit percentage on the marked price?
1). 31.25
2). 50
3). 56.25
4). 60
The ratio of the volume of two cylinders is 7 : 3 and the ratio of their heights is 7 : 9. If the area of the base of the second cylinder is 154 sq.cm, then what will be the radius (in cm) of the first cylinder?
1). $6\sqrt{2}$
2). $6\sqrt{3}$
3). $7\sqrt{2}$
4). $7\sqrt{3}$
10 women can do a piece of work in 6 days, 6 men can do same work in 5 days and 8 children can do it in 10 days. What is the ratio of the efficiency of a woman, a man and a child respectively?
1). 4:06:03
2). 4:05:03
3). 2:04:03
4). 4:08:03