# Math Help - Binomial probability

1. ## Binomial probability

There's 60% chance that an item will work. You have 7 of these items. What's the chance that 5 out of these 7 items will work?

I don't need it for homework, but a real world problem. All I really need is an equation so that I can calculate it for other numbers, no major explanation required..

2. Binomial.

$C(7,5)(0.60)^{5}(0.40)^{2}$