Answer: The amount paid by Alex = $38.4
Step-by-step explanation:
Given: The cost of each book = $8
Then the total cost of six books =
The discount percent on total cost = 20 %
Then, discount amount = 20% of total cost
=vvvvvvv
Therefore, the amount paid by Alex =
Hence, the amount paid by Alex = $38.4
It will be easier to understand this using a venn diagram :