Answer:
A. 16¾
Step-by-step explanation:
We will convert all the mixed fractions to improper fractions.
Monday, 5½ = [tex]\frac{11}{2}[/tex]
Wednesday, 6¾ = [tex]\frac{27}{4}[/tex]
Friday, 4½ = [tex]\frac{9}{2}[/tex]
Now, we will add all these fractions by taking the LCM of denominator.
The LCM of 2,4 and 2 is 4.
We get the following result after addition.
[tex]\frac{11}{2} +\frac{27}{4} +\frac{9}{2}[/tex]
= [tex]\frac{22+27+18}{4}[/tex]
= [tex]\frac{67}{4}[/tex] hours
In mixed fraction it becomes 16¾ hours.
