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).
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Question: Let g = 6 - 6. Let b = 3 + g. Suppose -w - b = -21. What is the tens digit of w?

Answer: 1


Question: Three letters picked without replacement from aanoaooonoaoa. What is prob of sequence nna?

Answer: 5/858


Question: Calculate prob of sequence hsh when three letters picked without replacement from {s: 3, h: 2}.

Answer:
1/10