19 · Probability [Prob] — printable QR sheet
6 stations, one per page. Print (portrait), post one at each station.
Talk-it-through problems take any real attempt for credit; timed problems gate hint 2 at 30 s
and Reveal at 60 s past that.
Printer tip: Ctrl/Cmd-P → portrait → “Background graphics” on if you want the flavor colors.
Station 1 of 6
2.1 — Sample Spaces & Counting
Mild Medium Hot Spicy
Station code
01d879a4
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/01d879a4/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 2 of 6
2.2 — Events: Unions, Intersections & Complements
Mild Medium Hot Spicy
Station code
23e28fb4
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/23e28fb4/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 3 of 6
2.3 — Conditional Probability & Independence
Mild Medium Hot Spicy
Station code
a4ccc106
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/a4ccc106/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 4 of 6
2.4 — Experimental vs. Theoretical Probability
Mild Medium Hot Spicy
Station code
63cae716
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/63cae716/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 5 of 6
2.5 — Expected Value & Decisions
Mild Medium Hot Spicy
Station code
5026c05e
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/5026c05e/
Scan → work it on the whiteboard → type the answer → show the summary screen.
Station 6 of 6
— Review (Probability)
Mild Medium Hot Spicy
Station code
dc69fe8b
students can type this at the front page instead of scanning
https://geo-stations.mrritchey.com/dc69fe8b/
Scan → work it on the whiteboard → type the answer → show the summary screen.