Bars show the exact binomial probabilities. Simulated runs use random numbers, so they differ every time.
Every problem is generated at random with practice numbers. The picture shows the distribution; the worked solution builds line by line underneath.
Your jobEach card describes some counts in words. Pick the matching inequality as fast as you can. You have 60 seconds. A right answer scores 1 point plus a bonus for every 3 in a row; a wrong answer costs 3 seconds.
Press Start to begin.
Keyboard: press 1 to 5 to choose an answer. The number boxes light up to show which counts the correct answer includes.
Fictional situations with practice numbers to learn the math, not medical, financial or betting advice.
Wrong picks are fine here. Each one tells you why.