Probability: how likely?

From impossible to certain, and listing outcomes. Read one part at a time and tap “I know this”. Then test yourself in the quiz.

Your progress0 of 2

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.

Tap when you could tell someone without looking.

First list all the possible outcomes. Coin: heads or tails (2 outcomes). Die: 1, 2, 3, 4, 5, 6 (6 outcomes).
Do the experiment many times and record each result with tally marks.
Rolling an even number (2, 4 or 6) is an even chance, because 3 of the 6 outcomes are even.

Tap when you could tell someone without looking.

Remember this: your summary

Write these points in your book. Read them again the night before the test.

Memory trick

Impossible – unlikely – even chance – likely – certain: from “never” to “always”.

Flash cards · Tap to turn over

First say the answer yourself, then turn the card over.

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.

For parents

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 4 Mathematics. Always check your teacher’s notes and textbook too.