Collect card expectations
Calculate and repetitively extract the desired number and standard deviation of all types in the repetitive extraction model.
Collect card expectations User manual
- Fill in the parameters or select the file according to the form, and check the unit and format first.
- 10 equal probability cards, repeatedly extracted until all are collected.
- Click the processing button to view the results, you can copy or download and save.
Calculation method and processing rules
Use the harmonic series to find the expectation, and the square inverse series to find the variance.
scope of use
It does not support the guarantee mechanism, probability difference, exchange or no put back draw, and the actual number of times is not guaranteed.
Will the input content be saved on the server?
This tool handles input in the browser, and does not upload files or form content. Typing practice scores are only saved in the native browser.
Why may the result be different from other tools?
It does not support the guarantee mechanism, probability difference, exchange or no put back draw, and the actual number of times is not guaranteed. Please compare the input unit, rounding method, applicable rules and data version first.