Probability

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

Ready to try

Ages 9–10
Equally Likely Outcomes
Understand that 'equally likely' means every outcome has exactly the same chance of occurring; identify whether a given situation has equally likely outcomes (a fair coin, a fair die, a spinner with equal sections) or unequally likely outc…
10 verified questions on this shelf
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
10 verified questions on this shelf
Ages 9–10
Ordering Likelihoods
Compare the likelihood of different events and order them from least to most likely — including situations with unequal outcomes such as a bag with more of one colour than another, or a spinner with sections of different sizes — and explai…
10 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…
12 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
Calculating Simple Probability
Calculate the probability of a simple event with equally likely outcomes using the formula: probability = number of favourable outcomes ÷ total number of possible outcomes; express the result as a fraction in its simplest form; apply to ro…
10 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…
12 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…
12 verified questions on this shelf
Ages 10–11
The 0-to-1 Probability Scale
Understand probability as a measure expressed as a number between 0 (impossible) and 1 (certain); place events on the probability scale; express probabilities as fractions, decimals, and percentages
9 verified questions on this shelf
Ages 11–13
Complementary events
Understand and apply the rule that probabilities of all mutually exclusive outcomes sum to one; use this to find the probability of a complementary event (P(not A) = 1 − P(A))
10 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 11–13
The Probability Scale
Understand probability as a measure on a scale from 0 (impossible) to 1 (certain); use the language of probability including likely, unlikely, certain, and impossible
12 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
10 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
10 verified questions on this shelf

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.