The average age of 11 players of a cricket team is increased by 2 months when two of them aged 18 years and 20 years are…

The average of runs of a cricket player of 10 innings was 32. How many runs must he make in his next innings so as to in…

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…

The average of n numbers x<sub>1</sub>, x<sub>2</sub>.....x<sub>n</sub> is $$\overli…

A batsman makes a score of 87 runs in the 17<sup>th</sup> inning and thus increases his average by 3. Find h…

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

If the mean of a, b, c, is M and ab + bc + ca = 0, then the mean of a<sup>2</sup>, b<sup>2</sup>…

The average of marks in Mathematics for 5 students was found to do 50. Later, it was discovered that in the case of one …