Answer:
a) 70%, 64%, 67%
Step-by-step explanation:
Total customers surveyed = 500
Number of men = 250
Number of women = 250
Number of men who rated the customer service excellent = 175
Number of women who rated the customer service excellent = 160
Total number of customers who rated the customer service excellent = 
Percentage of men who rated the customer service excellent
⇒ 
⇒ 
⇒ 70%
Percentage of women who rated the customer service excellent
⇒ 
⇒ 
⇒ 64%
Percentage of customers who rated the customer service excellent
⇒ 
⇒ 
⇒ 67%
So, the correct order is : 70%, 64%, 67% (Answer)