Answer:
24 customers will not use coupons.
Step-by-step explanation:
Number of customers who use coupons = 9
Number of customers who don't use coupons = x
Ratio of customers who use coupons to customers who don't use coupons = 6:16
[tex]=\frac{6}{16}[/tex]
[tex]\frac{9}{x}=\frac{6}{16}[/tex]
[tex]x=\frac{9\times 16}{6}=24[/tex]
24 customers will not use coupons.