Answer:
the time left for question C is [tex]\frac{23}{4}[/tex] minutes
Step-by-step explanation:
The computation of the amount left for question C is shown below:
Time left for question C = Total time - time spend on question A - time spend on question B
[tex]= 20 - 9 \frac{3}{4} - 4\frac{1}{2} \\\\= 20 - \frac{39}{4} - \frac{9}{2}\\\\= \frac{80 - 39 - 18}{4}\\\\= \frac{23}{4}[/tex]
hence, the time left for question C is [tex]\frac{23}{4}[/tex] minutes
