I want to randomly choose an item from a list of items, each of which has a different probability of being chosen. So essentially I have

A 10e-6

B 2x10e-7

C 10e-5

etc.

I want to reach in and choose an item randomly and to have the frequency with which I choose item A, B, C, etc. reflect the frequency that it is present. I can think of messy ways to do this, e.g. populate an array with items according to their frequencies and then randomly choose one item from the array. Can someone suggest a better approach? Thank you.

In reply to an algorithm to randomly pick items that are present at different frequencies by efoss

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