Question attached
Answer:
130
Step-by-step explanation:
Number of students old donors can be calculated from the Pareto chart by adding number of blood donors on the different bars:
Type 0= 50
Type A= 35
Type B =30
Type AB =15
Therefore 50+35+30+15=130 blood donors
The discount was 85% off.
The answer to this would be x = 20
Essentially 11(4d + 6) = 11*4d + 6*11
44d + 66
The discount sales price would be $218