Back to Exercise: Probability Using Venn Diagrams

Exercises: Probability Using Venn Diagrams

Work through each section in order. Express probabilities as fractions in simplest form, and check that your probabilities add to 1 where applicable.

Grade 6·21 problems·~28 min·Uganda NCDC Primary 6 Mathematics·lesson·sets-04

Work through problems with immediate feedback

Recall / Warm-Up

A bag has 10 balls: 6 red and 4 blue. What is the probability of picking a red ball?

6:10, written as a ratio comparing red balls to the total.

6/10, simplified to 3/5, since probability is written as a fraction of favorable outcomes over total outcomes.

6, the number of red balls, without needing to compare it to the total.

A bag has 10 balls: 6 red and 4 blue. What is the probability of picking a blue ball? Give your answer as a fraction in simplest form.

In your own words, what does 'probability' mean?

Fluency Practice

A basket has 20 fruits: 12 oranges and 8 mangoes. What is the probability of picking an orange? Give your answer as a fraction in simplest form.

In the same basket of 20 fruits (12 oranges, 8 mangoes), what is the probability of picking a mango? Give your answer as a fraction in simplest form.

In a class of 40 learners, 25 like football (F), 18 like netball (N), and 10 like both. What is the probability that a randomly chosen learner likes only football? Give your answer as a fraction in simplest form.

In the same class of 40 learners (25 like football, 18 like netball, 10 like both), what is the probability that a learner likes neither football nor netball? Give your answer as a fraction in simplest form.

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