Stealth Probability Question (Teebo + Nute)

I'm curious about Teebo (leader) + Nute on the same squad. Teebo gives a each member a 55% chance to stealth on each turn. Nute has a 55% chance to stealth each time he uses cowardly shot (his basic attack).

Do these 2 probabilities combine in anyway? Here's how I took it:

Each turn, there are 4 possible outcomes for Nute when he uses cowardly shot.

-Stealth proc from Teebo
-Steath proc from Nute
-Stealth proc from both
-No stealth proc

So the revised probability of Nute stealthing would be 1-(probability of him NOT stealthing).

= 1- (.45*.45) ~ .798 = 79.8% chance of Nute hitting stealth on each use of cowardly shot. Is this correct or am I totally out to lunch? Thanks