The answer should be C.
I don't know how to use type to draw a Venn, but I can try to explain. Please keep in mind that these questions have multiple possibilities. There are: 'Coffee Only', 'Dessert Only', 'Coffee and Dessert', and 'Neither'. Also keep in mind that you don't have to solve the problem, just need to know if you CAN or not.
So from statement 1, we know who ordered 'Coffee and Dessert' (93% of 75%), but we don't know who make up 'Coffee Only'. The point is to find out both 'Coffee and Dessert' and 'Coffee Only' to know who ordered Coffee in general. Therefore, A and D will not work. However, at this point we know that 'Coffee and Dessert' is a certain number [(93%of75%)=(69.75%OfAllCustomers)] (although you don't need to know that, as long as you know you COULD have found out if you tried).
Statement 2 is like 1; we find out nothing that can solve the problem on its own. However, using both, we can find out how many ordered 'Coffee Only' because we know 'Coffee and Dessert' already (69.75%), and 'Coffee Only' is 20% of all Coffee Orders. Technically, if you divided 69.75 by 0.8, you would get your answer (87.1875%OrderedCoffee, but once again, we don't need the answer as long as we know that we COULD get it if we tried.. Or had a calculator.. Which I used.. And couldn't bring myself to lie about).
I just read this over, and it is a little confusing, but I hope it helps. It's really important to not try to solve these, but I put the concrete numbers there so you believe me when I say you can find out the answers if you wanted to.
