Jace and Keiko each take care of several birdhouses. Jace thinks
his birdhouses are more popular but Keiko disagrees. They decide
to test their conjectures. They both count the number of birds
that visit their birdhouses in one afternoon. Jace counts 12 birds
that visit his 5 birdhouses, while 15 birds visit Keiko's 6 birdhouses.
Whose birdhouses are more popular?