Question

If the mean of the observation: x, x+3, x+5, x+7, x+10 is 9. Find their median.

Answer 1

mean = sum of all observations/total no. of observations

here, mean= x+x+3+x+5+x+7+x+10/5

9 = 5x+25/5

5x+25 = 45

5x = 20

x = 4

so we have data as follows:

4, 7, 9, 11, 14

now using this data find the median

Answer 2

mean =sum of observations÷no. of observations
using this formule we can find put the value of x that comes to 4
hence all the numbers are 4,7,9,11,14
hence ,
median =the middle most number
that is 9
hence the median is 9
Hope so it is correct