If the average of 31, x, 42, 39, 56, 78, 83 and 91 is 58.5, then what is the value of x?

 

The average weight of 25 bags is 55 kg. The weight of one bag was misread as 65 instead of 56. Find the correct mean value.

The average height of A, B and C is 148 cm. If the average height of A and B is 136 cm and that of B and C is 125 cm, then what is the height (in cm) of B?

The median of the numbers 4, 2, 2, 6, 3 and 8 is

Find the mean value of 2, 3, 3, 4, 6, 7

Find the value of '?, if the mean of the data set 18, 16, 22, 13, ? = 16.

Average of 10 numbers is 14. If each number is multiplied by 6, then what will be the new average?

The sum of 15 observations of a data is (434 + x). If the mean of the data is x, then the value of x is

The mean of 10 observations is 17. One more observation is included and the new mean becomes 16. The 11th observation is