Hi Nick. Note that each question requires two answers, so I'm not sure what your 18 represents. (It would have been nice to see your work; that is, your drawing.)

In the first question, Faizel makes 50 cheese wheels. You need to report the number of soft-cheese wheels

*and* the number of blue cheese wheels.

Think of the phrase "3 in every 5" as a ratio. We can write ratios as fractions: 3/5.

Likewise, "2 in every 10" can be thought of as 2/10. That's the same as 1/5.

In other words, every five wheels produced consist of 3 soft-cheese wheels, 1 blue-cheese wheel and 1 wheel of some other type that we don't care about. (We don't care about the third type of cheese because we're not asked anything about it.)

Do the ratios give you any ideas?