Probability

What you'll learn

1. 1

   Imagine a bag of 3 red marbles and 1 blue marble. If you grab one without looking, which colour are you more likely to pull out?

2. 2

   In the bag of 3 red 🟥 and 1 blue 🟦 marbles, which colour is MORE LIKELY?

3. 3

   Drag marbles into the bag so it has 2 red and 2 blue. What is the probability of pulling a red marble now?

4. 4

   Let's find the probability of pulling a blue marble from a bag of 3 red and 1 blue.

5. 5

   Now try it: a bag has 5 red and 3 blue marbles. What is the probability of pulling a red marble?

6. 6

   A spinner has 4 equal sections: red, blue, green, yellow. What is the probability of landing on green?

7. 7

   If you flip a fair coin, what is the probability of getting heads?