When scientists spot an asteroid whose trajectory might take it close to Earth, they monitor it frequently and calculate the probability that it might collide with our planet.

I'm working through the Rosalind.info problems, and one of the things I'm hung up on is calculating the probability of a given parental pair when the population is specified.

The likelihood that a song by a specific band will be played is proportional to the number of songs of the particular band divided by all songs. Since the selection is arbitrary and songs may be ...