the mean (average) of the data set below
2/4, 18/5, 28/10, 5/20
We are given with 4 fraction
to find mean , we add all the fractions and divide by 4
Lets add all the fractions
[tex]\frac{2}{4} + \frac{18}{5} + \frac{28}{10} + \frac{5}{20}[/tex]
Make the denominators same
LCM is 20
Try to get 20 in the denominator
[tex]\frac{2*5}{4*5} + \frac{18*4}{5*4} + \frac{28*2}{10*2} + \frac{5}{20}[/tex]
[tex]\frac{10}{20} + \frac{72}{20} + \frac{56}{20} + \frac{5}{20}[/tex]
[tex]\frac{143}{20}[/tex]
Now we divide by 4
[tex]\frac{\frac{143}{20}}{4}=\frac{143}{80}=1\frac{63}{80}[/tex]
