# How many coins? - The Sequel

Discrete Mathematics Level 5

My nearest doughnut stall sells donuts in packs of $$1$$, $$2$$, or $$5$$. I keep on ordering such doughnut packs uniformly at random until I have a total of more than or equal to $$400$$ doughnuts.

If the expected number of $$5$$ packs I ordered is $$n$$, what is the value of $$\left\lfloor 10n\right\rfloor$$?

Thanks to @bobbym none for checking the answers

×