Answer: 16 printers.
Explanation:
We know that every 5 computers sold, the store sells 2 printers.
We know that the store sold 40 computers.
How many groups of 5 computers there are in 40 computers?
there are 40/5 = 8 groups of 5 computers.
So the sotre sold 8 times 2 printers = 8*2 printers = 16 printers