Problem:
Compute the mode of ${-7, 5, -7, 7, 7, -7, 3, -7, 3, 7, -7, -7, -7, 5, -7, 5, 7, 5, -7, 5}$.
Answer:
$\{-7\}$
{'source': 'AMPS', 'file': 'amps/mathematica/counting_and_statistics/mode/47548.txt'}