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).

Two letters picked without replacement from {f: 3, l: 2, s: 4, q: 1}. Give prob of sequence lq.
1/45

Suppose i = w - 15 + 48, -100 = -4*i - 4*w. Let f = -3 + -4. Let k be (-9 - -1)/(5 + f). Solve -4*h - k*v = v - i, 0 = -5*h + 4*v - 15 for h.
1

Calculate prob of sequence lc when two letters picked without replacement from rrrclrhm.

1/56