For the following questions answer them individually
In a class there are 33 students comprising of boys and girls. In a monthly test, the average score of the class was 14. The average score of girls and boys of the class was 15 and 12 respectively. Assuming that all the students had taken the test, what is the number of girls in the class?
A petrol tank at a filling station has a capacity of 400 litres. The attendant sells 40 litres of petrol from the tank to one customer and then replenishes it with kerosene oil. This process is repeated with six customers. What quantity of pure petrol will the seventh customer get when he purchases 40 litres of petrol?
A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, the probability that it bears a perfect square number is:
The following questions are to be answered on the basis of the table given below.
If pie charts were to be drawn for the different categories of personnel, what would be the angle subtended by the system analysts for the year 2010?
Since the total number of staff is different, the ratio of the radius of the circle for 2014 to that of circle for 2010 should?
The number of categories for which the sector angle has decreased in 2014 compared to 2010 is: