Question

what is the better buy 4 GB flash drive for $8, 2 GB for $6 or 8 GBfor $13Z

Answer 1

To know what is the better buy we have to know how much does each GB cost in each case.

For the 4 GB flash drive we have that

$\frac{8}{4}=2$

then each GB cost $2.

For the 2 GB flash drive we have that

$\frac{6}{2}=3$

then each GB cost $3.

Finally for the 8 GB we have that

$\frac{13}{8}=1.63$

then each GB cost $1.63.

Comparing the prices for each GB we conclude that the best buy is the 8 GB flash drive.