Problem Solving (PS) | Re: At a certain health club, 30% of the members use both pool a

One way to look at this:
- 40 = pool
- 30 = pool + sauna
- 60 = sauna (100 minus 40)

so how many pool? Pool users total = pool + pool - (pool+sauna overlap) => 40 + (40 - 30) = 50%

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