There are 3 groups of students, each containing 25, 50 and 25 students respectively. The mean marks obtained by the firs…

A man travels equal distances of his journey at 40, 30 and 15 km/h. respectively. Find his average speed for whole journ…

If the average weight of 6 students is 50 kg. If two student of average weight of 51 kg are added and two other students…

In a 20 over match, the required run rate to win is 7.2. If the run rate is 6 at the end of the 15th over, the required …

There are three categories of jobs A, B and C. The average salary of the student who got the job of A and B categories i…

In Arun's opinion, his weight is greater than 65 kg but less than 72 kg. His brother does not agree with Arun and he thi…

The mean high temperature of the first four days of a week is 25°C whereas the mean of the last four days is 25.5&de…

Average weight of 25 students of a class is 50 kg. If the weight of the class teacher is included , the average is incre…