A deck of cards
The probability lesson’s favourite. Twenty-six cards are red, 13 are hearts, 12 are face cards. Every heart is red, so the hearts circle sits inside the red one. Six face cards are red, three of them hearts.
Drawn to scale, the picture shows what the lesson is about: one set inside another, and a third cutting across both.
Filed under maths, probability, school
| Red cards | 26 |
|---|---|
| Hearts | 13 |
| Face cards | 12 |
| Red cards & Hearts | 13 |
| Red cards & Face cards | 6 |
| Hearts & Face cards | 3 |
| All three | 3 |