Given a simple high-school level math question, you are required to solve it and provide the final answer. The final answer is always a single number. These questions can range from a variety of topics like simple arithmetic, solving equations, converting a quantity from one unit to another, finding remainders/GCD/LCM, finding probabilities etc. Each question has only one correct answer. This answer can be a positive or negative integer, a fraction or a decimal number. If the answer is a negative number use the hyphen (e.g. -42) symbol for the minus sign. For decimal numbers, do not add extra zeros after the decimal point. For fractional numbers, separate the numerator and denominator using a forward slash (e.g. 3/25).

Calculate prob of picking 2 n and 2 o when four letters picked without replacement from {o: 17, n: 3}.
8/95

Let p(x) = -5*x + 1. Let o be p(-2). Let b = 22 - o. Calculate the highest common factor of 44 and b.
11

Two letters picked without replacement from {f: 1, j: 1, o: 2, a: 1, u: 1, q: 1}. What is prob of picking 1 o and 1 u?

2/21