The last questions I need... help!

Here's just the first one:

80 members would buy one, the other, or both. That means  125 - 80 , or  45  members would not buy either type.

The rest of the numbers I found by subtracting the total from the other numbers in the row or column.

So the probability that a randomly selected gym member would buy passion fruit but not tropical grape is...

19 / 125   =   15.2%   ≈  15%

Could you get us some better images for the last two?