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…

A has 50 coins of 10 paise denominations. While B has 10 coins of 50 paise denominations. C has 20 coins of 25 paise den…

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…

The average of 6 observations is 45.5. If one new observation is added to the previous observations, then the new averag…

In an exam, the average marks obtained by Jhon in English, Math, Hindi and Drawing were 50. His average mark in Maths, S…

The average height of 25 boys is 1.4 m. When 5 boys leave the group, then the average height increased by 0.15 m. What i…

Find the average of the following sets of scores:<br>385, 441, 876, 221, 536, 46, 291, 428

When a student weighing 45 kgs left a class, the average weight of the remaining 59 students increased by 200g. What is …