Use "hit-or-miss" in a sentence

1. often felt as if I was filling the heads of my kids with trivia that only in a hit-or-miss fashion might have any relevance to their lives

2. The hitters work purely on a hit-or-miss basis

3. Many managers follow a hit-or-miss, intuitive method of stock selection

4. There was a blue-and-white, hit-or-miss rag rug on the floor