Probability

15 Skills in Mathematics. 9 are ready to try — three verified questions each, no account needed.

Ready to try

Ages 9–10
Likelihood Language
Use probability language to describe and compare the likelihood of everyday events using words such as certain, likely, even chance, unlikely, impossible
9 verified questions on this shelf
Ages 9–10
Probability as a Fraction
Describe the probability of simple equally-likely outcomes using unit fractions: the probability of rolling a 6 on a fair die is 1/6, flipping heads is 1/2, picking one specific colour from three equally represented colours is 1/3; place t…
9 verified questions on this shelf
Ages 9–10
Simple Chance Experiments
Conduct simple probability experiments — flipping a coin, rolling a die, pulling coloured counters from a bag — record results, and compare experimental outcomes with expected theoretical outcomes
5 verified questions on this shelf
Ages 10–11
Experimental vs Theoretical
Run repeated probability experiments and compare experimental (relative frequency) results with theoretical predictions; understand and demonstrate that as the number of trials increases, the experimental probability tends towards the theo…
9 verified questions on this shelf
Ages 10–11
Probabilities Sum to One
Understand that when all possible outcomes of a trial are listed, their probabilities must add up to 1; use this to find the probability of an event NOT happening: P(not A) = 1 − P(A); apply this shortcut to avoid counting all unfavourable…
9 verified questions on this shelf
Ages 11–13
Experimental probability
Record, describe, and analyse the frequency of outcomes from probability experiments to develop an understanding of relative frequency as an estimate of probability
32 verified questions on this shelf
Ages 12–14
Sets & Venn Diagrams
Enumerate sets and their unions and intersections systematically using tables, grids, and Venn diagrams to organise and count outcomes
5 verified questions on this shelf
Ages 12–14
Tree diagrams
Generate theoretical sample spaces for single and combined events using listing, tables, and tree diagrams, and calculate theoretical probabilities as the number of favourable outcomes divided by the total number of equally likely outcomes
23 verified questions on this shelf
Ages 12–13
Venn Diagrams and Counting Outcomes
Construct and interpret Venn diagrams with two or three sets to organise and count outcomes; use systematic listing and the product rule for counting to enumerate all possible outcomes of combined events
5 verified questions on this shelf

Being planted

These Skills are on the map, but their questions are still being written and checked.

Ages 9–10
Equally Likely Outcomes
Coming soon
Ages 9–10
Ordering Likelihoods
Coming soon
Ages 10–11
Calculating Simple Probability
Coming soon
Ages 10–11
The 0-to-1 Probability Scale
Coming soon
Ages 11–13
Complementary events
Coming soon
Ages 11–13
The Probability Scale
Coming soon

Skill names and descriptions include the Marble Skill Taxonomy © Generative Spark, Inc. (withmarble.com), licensed under ODbL 1.0 (database) and CC BY-SA 4.0 (content). Practice questions are GlowGrades's own, each checked by independent verifiers that must agree before a child ever sees it.