Fiona kept the following records of her phone bills for 12 months:

55, 50, 64, 54, 71, 57, 55, 48, 66, 71, 59, 70

Find the mean and median of Fiona’s monthly phone bills.

*Solution:-*

First arrange the values in ascending order which is given bellow

48, 50, 54, 55, 55, 57, 59, 64, 66, 70, 71, 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== 60

When the number of values of even then medain =avarge of = th term and ()+1 th term

Where n=number of terms

So here medain=[ + ( )+1]/2=

6 th term is 57

7 th term is 59

So median= = 58