If the average weights of three classes of 58, 56 & 59 students respectively is 45, 50, 52 kg. Then what is the average weight of all students?
The average of the first and the second of three numbers is 5 more than the average of the second and the third of these numbers. What is the difference between the first and the third of these three numbers?
1). 15
2). 9
3). 6
4). 10
In a survey, the average weight of a group of 45 kids was calculated as 33 kgs. It was later discovered that the weight of one of the kids was read as 38 kgs., whereas her actual weight was 27 kgs. What is the actual average weight of the group of 45 kids? (Rounded off to two-digits after decimal).
Average marks obtained in English by 45 students in ‘A’ division are 75 and the average marks obtained by 40 students in ‘B’ division are 78. What are the overall average marks obtained in English by the students in both the divisions (rounded off to two digits of decimal)?
1). 45.12
2). 81.23
3). 76.41
4). 89.12
One fifth of a tank is filled by pipe at the rate of 10 lit/h, three - fifth of a tank is filled by pipe at the rate of 15 lit/h and rest at the rate of 5 lit/h. If average rate of pipe at which tank will completely get filled is 'A' lit/hr then, find the value of 'A'?
1). 5
2). 10
3). 12
4). 25