The Khan academy uses this method to solve similar problems so I think it's the right way.
I believe it's a standard textbook way to solve the problem. So? Are you going to do the 10,000 spins? LoL
Anyways, Roobet's "Guess the Slot" from 9th to 21st round (RTP info from slotcatalog.com):
- Tractor Beam (96.01% - Med/High);
- Crazy Starter (96.04% - Med);
- Voodoo Gold (96.1% - High);
- Fire Lightning (97.61% - Med/High)
- Sky Gems 5 Wilds (N/A);
- Spin and Spell (95.8% - N/A);
- Dragon's Fire (95.25% - High);
- Mechanical Orange (96% - N/A);
- Phoenix Fire Power Reels (95.13% - Med/High);
- Avalon: The Lost Kingdom (95% - N/A);
- Spin Town (95.07% - Low);
- Midas Golden Touch (96.1% - Med/High);
- Turning Totems (96.1% - Low/Med).
Fire Lightning is one of my "menu" when I'm on a "jump around" mode.