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:
Four letters picked without replacement from vjxsxjsjj. What is prob of sequence jxvx?
answer:
1/378


question:
Solve 3*x = t + 11, 2*x = 3*x + 4*t - 21 for x.
answer:
5


question:
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}.
answer:

1/510