Let the full marks be represented by = x
As given, 80% of x is 75
So,

x= 
x=93.75
Hence, full marks is 93.75
We can check also-
=75
Answer: It might be C
Step-by-step explanation:
Answer: 8.66666666667
Step-by-step explanation:
$6 is 20% of a $30 haircut