Probability
From impossible to certain, outcomes and chance as a fraction. Read one part at a time and tap “I know this”. Then test yourself in the quiz.
Know it already? Jump straight to the quiz
How likely?
Probability says how likely something is: impossible, unlikely, even chance, likely, certain.
- The sun rises tomorrow: certain. A coin lands heads: even chance. A dice rolls 7: impossible.
Outcomes and fractions
An outcome is a possible result. A dice has 6 outcomes. The chance of rolling a 4 = ⅙.
Probability = favourable outcomes ÷ all possible outcomes.
In an experiment you count what really happens (relative frequency); the more trials, the closer to the theoretical chance.
Recording an experiment
Toss a coin 50 times and record each result with tally marks. The possible outcomes are heads and tails. You might get heads 27 times and tails 23 times (27 + 23 = 50).
- That is close to half-half, but not exactly. With more tosses the counts usually get closer to each other.
- Write a sentence that compares the results: “Heads came up 4 more times than tails.”
Remember this and test yourself
- Impossible, unlikely, even chance, likely, certain.
- A coin: even chance of heads or tails.
- Chance = favourable ÷ all outcomes.
- A dice has 6 outcomes.
Write these points in your book. Read them again the night before the test.
0 = impossible, ½ = even chance, 1 = certain.
Important words
First say the answer yourself, then turn the card over.
Match column A to column B
Tap a word in column A, then its meaning in column B. You can also start in column B.
Now the real quiz!
The quiz has many more questions on this topic. Every question shows straight away whether you are right and explains why.
Take the quiz: Probability- Let your child work the examples on paper and explain them to you.
- The ticks (“I know this”) are saved on this device only. We never ask for names or emails.
Follows CAPS for Grade 6 Mathematics. Always check your teacher’s notes and textbook too.