The marks obtained in chemistry by the 15 students of class XI B are

20, 15, 10, 20 27, 28, 27, 10, 20, 30 35, 40, 41, 41, 20 then the value of mode is

Find the mean age from the following  data
Age ( Years ) :          20 - 30    30 - 40    40 - 50   50 - 60    60 - 70
Number of person :   3                 5             22          30          2         is 

One of the method of determining mode is

The means  of the series 1, 2, 4, 8, - - - -  2ⁿ is 

The median of the observations  2, 30, 12, 25, 20, 8, 10, 4, 15, Is

The mean of  9 observation  is 100 and that of 6 observations is 80,  then the combined mean of all 15 observation is

If in a moderately skewed distribution the value of mode and mean are 6 λ  and 9λ  respectively, then the value of the median is  ______.

The heights  ( in cm ) of the 15 students of a class are 152, 145, 156,  149, 151, 159, 148, 160,  153, 154, 150, 143, 155,

157, 161 cm.  The median of  height of the student is

The median of the daily wages of ten   worker in Rs. 20, 25, 17, 18, 8, 15, 22, 11, 9, 14 is 

If in a frequency distribution, the mean and median are 21 and 22 respectively, then its mode is approximately?