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).

Example Input: Three letters picked without replacement from {e: 6, k: 1, f: 5, o: 7}. What is prob of picking 1 o and 2 e?
Example Output: 35/323

Example Input: What is prob of picking 2 d when two letters picked without replacement from tqqqqqttdtqdqq?
Example Output: 1/91

Example Input: Calculate prob of picking 1 x and 1 t when two letters picked without replacement from {r: 3, c: 3, x: 1, t: 5, h: 1}.
Example Output:
5/78