posted by hanaa .
assume you have a computer that contains 2 GB memory . It contains four memory slots . Each slot can contain 128 MB,256 Mb,512 MB,1 GB or 2 GB memory modules. currently ,each slot contains a 512 MB memory module . Determine which of these combinations is the least expensive to upgrade my computer to 8 GB ?
you say nothing about the cost of each module.
However, since the only way to put 8GB into 4 slots is to use 4x2GB modules, it doesn't much matter what the relative costs are.
Stupidly constructed problem.