15th June Learning summary of probability

Today we continued digging out how to calculate and what the principles of it is with unordered sets (repetition allowed).

And at the last, there is a formula n(N-1)/N-1 (n objects in a row, chosen from N objects) waiting to be verified, expecting that next time I can learn it smoothly without difficulty.

你可能感兴趣的:(15th June Learning summary of probability)