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).

[Q]: What is prob of picking 1 c and 1 b when two letters picked without replacement from bbbbbbbbbbbbbbccbb?
[A]: 32/153


[Q]: Solve -i + z + 1 = 0, 17 = 2*i - 7*z + 2*z for i.
[A]: -4


[Q]: What is 5.346329 nanograms in grams?
[A]:
0.000000005346329