## Simple Random Sample vs Random Sample

Problem:
"A computer company employs 100 software engineers and 100 hardware engineers. The personnel manager randomly selects 20 of the software engineers and 20 of the hardware engineers and questions them about career opportunities within the company. Does this sampling plan result in a random sample? Simple random sample? Explain?"

What I have done so far: - For a moment I thought this was both a simple random sample and a random sample, but I found out my choice was wrong. Then I guessed it was a Simple Random Sample, but not a random sample. I have included the definitions I was presented with.

A simple random sample of n subjects is selected in such a way that every possi-
ble sample of the same size n has the same chance of being chosen.

In a random sample members from the population are selected in such a
way that each individual member in the population has an equal chance of
being selected.

My Questions:

1)How do you diffreniate between these between simple random samples and random samples? (These definitions in my opinion do not clearly present the difference)

2) What is the approach to solve the problem above?