50 POINTS! Name a pair of whole numbers that have a geometric mean of 4. How many pairs of rational numbers have a geometric mean of 4?

please help and don't say something random just for the points :)​

Atown recently dismissed 5 employees in order to meet their new budget reductions. the town had 5 employees over 50 years of age and 19 under 50. if the dismissed employees were selected at random, what is the probability that exactly 2 employees were over 50? express your answer as a fraction or a decimal number rounded to four decimal places.