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:
What is prob of picking 4 y when four letters picked without replacement from yyyyyyyymmmymm?
answer:
18/143


question:
Two letters picked without replacement from {l: 1, i: 3, o: 1}. Give prob of picking 1 i and 1 l.
answer:
3/10


question:
What is prob of picking 1 j, 2 p, and 1 z when four letters picked without replacement from {z: 3, j: 2, p: 10}?
answer:

18/91