instruction:
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).
question:
Calculate prob of sequence kkw when three letters picked without replacement from wwkkwkwwwwkkwwww.
answer:
11/168


question:
What is prob of sequence dd when two letters picked without replacement from uddudd?
answer:
2/5


question:
Calculate prob of picking 2 k when two letters picked without replacement from {c: 2, f: 1, r: 1, k: 2, u: 1}.
answer:

1/21