9.

Either an odd number or an even prime number.

Well, the only **even** prime number is 2. Everything else is divisible by 2, making it not prime.

So, we know on a 16 sided die that the numbers 1, 3, 5, 7, 9, 11, 13, and 15 are on there and apply to the **odd number** portion.

We have 8 numbers plus 1 extra number. 9 numbers in total, so divide 9 by 16.

9/16 = 0.5625

Rounded to the thousandths, it's **0.563**.

10.

Now, in this, we are NOT going to look at the Freshman, Sophomore, or Junior sections, as it is given that they are a **Senior.**

Our denominator will be 16+15+7, which is 38

Now we take however many preferred evening classes (7) and divide that by 38

7/38 = 0.1842105263157895

Rounded to the nearest thousandth, the answer is **0.184**.