Another way of doing it is to download the trial version of The Staking Machine (google those words to find the program). In it yo ucan create random data, simply enter your strike rate, and generate up to 4000 results at a time. It can also then tell you stats like longest run of outs and longest winning streak, quite a handy tool that I like to use for creating large samples of data to play round with.

Hope this may be of some use to you.