16th question of median

Answer:
36
Explanation:
first arrange them in ascending order
u get 25 28 31 36 40 50 72
we have 7 observations
formula for median is n/2 if it is even n+1/2 if it is odd ( n= no. of observations)
give no. of observations are odd so
7+1/2=8/2=4
therefore 4th observation is our answer
now count from first or from back 4 the observation that is 36 will be our required answer for given problem