March Randomness #6
Two red cards have an A on the back, and two red cards have a B on the back. Two green cards have an A on the back, and one green card has a B on the back. Shuffle the cards and select one red and one green at random.
Will both cards have the same letter on the back?
Intuition
Simulation
Calculation
Red Card: A1, A2, B1, B2
Green Cards: A3, A4, B3
A1,A3 A1,A4 A1,B3
A2,A3 A2,A4 A2,B3
B1,A3 B1,A4 B1,B3
B2,A3 B2,A4 B2,B3