Fiona kept the following records of her phone bills for 12 months:
50, 
54, 
57, 48, 
71, 
70
Find the mean and median of Fiona’s monthly phone bills.
Solution:-
First arrange the values in ascending order which is given bellow
50, 
55,57,64,70,71
Mean=sum of terms /number of terms
Sum of terms=48+50+54+55+55+57+59+64+66+70+71+17=720
Number of terms=12
So mean=720/12=![60 When the number of values of even then medain =avarge of n/2 th term and (n/2)+1 th term Where n=number of terms So here medain=[12/2 + (12/2)+1]/2=(6 th term+7 th term)/2 6 th term is](https://mymathangels.com/wp-content/ql-cache/quicklatex.com-c6dd54e4142b4a4c7a4024ee821b3004_l3.png "Rendered by QuickLaTeX.com")
57
7 th term is 
58