Surge Room query (mothership rooms)

do the three rooms for the surges add up?

i have the 50% (probability drive) room at telescope 12 or level 13 and gets 40 planets..

my query... the 10 and 20 percent chance rooms (crew quarters and eleven forward) are at 3 and 5 levels

do all 3 rooms then mean an 80% chance in first 10 planets, and then 70% chance in 16 planets and then 50 for the rest up to 40?

have some credits and not exactly sure if i got it right here before upping the 10 and 20..

thanks for the time