1. ## Simple random sample

A simple random sample of size n = 50 is taken from a population of size n = 8000. What is the probability that any given unit is selected to be in the sample?

Thanks

2. Originally Posted by rologolfer
A simple random sample of size n = 50 is taken from a population of size n = 8000. What is the probability that any given unit is selected to be in the sample?

Thanks
$\frac{{1 \choose 1} \cdot {7999 \choose 49}}{{8000 \choose 50}}$