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).

Q: What is prob of picking 3 t and 1 b when four letters picked without replacement from {t: 5, b: 3}?

A: 3/7
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Q: What is prob of picking 2 p when two letters picked without replacement from {z: 1, p: 2, d: 1}?

A: 1/6
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Q: Suppose 3*d + 0*d = -5*l + 2, 5*l = 5*d - 30. Let q(v) = -8*v**3 + 2*v**2 + 3*v + 2. Let k be q(l). Calculate the greatest common factor of 17 and k.

A:
17
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