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For example, in the binomial tree model, given the volatility, the u=exp(\sigma*\sqrt{\delta t}). In the following example, u=exp(0.22*\sqrt{0.5}). Moreover,

p=(exp((r-q)\delta t)-d)/(u-d)

I think I understand how to do the following problem. However, my question is, how many digits should we keep in the exam?

Like in the problem, there are many layers that need rounding, which makes the final answer (216.67) can be off, depending on how to round u,d, and thus (u-d) in p, and so on. For example, keeping 4 digits or 2 digits of u or d (and thus p), will make the results different.

I hope we can just find the closest answer in the exam? (I assume no two choices will be as close as/within rounding error difference? finger-crossed)

Thanks!

p=(exp((r-q)\delta t)-d)/(u-d)

I think I understand how to do the following problem. However, my question is, how many digits should we keep in the exam?

Like in the problem, there are many layers that need rounding, which makes the final answer (216.67) can be off, depending on how to round u,d, and thus (u-d) in p, and so on. For example, keeping 4 digits or 2 digits of u or d (and thus p), will make the results different.

I hope we can just find the closest answer in the exam? (I assume no two choices will be as close as/within rounding error difference? finger-crossed)

Thanks!

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