Will keep 1 best plant - How many reg seeds to germ?

Hello! I only have room for one plant, and have a bunch of reg seeds to germinate. I want to waste as few seeds as possible, but I also want to germinate & start to grow enough plants so that I have at least one healthy girl to grow through to harvest.

How many regular seeds do you think I should germ in order to safely bet that I will have at least 1 healthy female? 4-5?

Thanks!