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).

Two letters picked without replacement from vxvxxvvvvvvvxg. What is prob of sequence vv?
36/91

Calculate prob of picking 1 c and 3 d when four letters picked without replacement from {i: 2, h: 4, k: 3, c: 6, d: 3}.
1/510

Suppose 5*v + c + 275 = -0*c, 2*c - 220 = 4*v. Let f = 127 + v. Calculate the highest common divisor of 24 and f.

24