Kirk is helping his grandparents set up their new portable music players. His grandmother, Maude, has $1$ jazz album, $2$ country western albums, and $5$ heavy-metal albums. Kirk’s grandfather, Claude, has $3$ classical albums, $2$ rap albums, and $7$ heavy-metal albums.

If Kirk’s grandparents’ portable music players are on random shuffle mode, who has the greater chance of listening to a heavy-metal album? Explain how you know.