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 sequence gyy when three letters picked without replacement from {g: 14, y: 4}.
7/204

Two letters picked without replacement from jbbfbbbfffo. What is prob of sequence jf?
2/55

Suppose -3*w + 30 = 2*i, 4*i - 7*i = 0. Solve 2*o + 7*a + w = 4*a, -5*o - 14 = 2*a for o.

-2