Who can help me write an EXCEL coin toss program?

Give a general idea: use random function = if (rand () >; 0.5, 1, 0) Let the cell generate a number of 0 or 1, copy down10,000 lines, and sum at 1000 1 lines. If you want to do this experiment many times, you can copy column A horizontally for sampling. As for your chart, you can make different average probability and marginal probability according to your own requirements.

I hope it helps you.