An item is regularly priced at $90. john bought it on sale for 20% off regular price. how much did john pay

John paid $72

Step-by-step explanation:

To find the discount, we take the regular price and multiply it by the discount percentage

Discount = 90 * .2

               = $18

The new price is the regular price minus the discount

New price = 90 -18

                 = $72

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.

c

step-by-step explanation:

i think because what else can be a sample of every member