Permutations, combinations and additional discrete distributions

3 quick checks≈2% of the testCore

Reading is free. Sign in to tick off lessons, keep your place and track your mastery.

By the end you’ll be able to

Calculate the number of arrangements and selections using permutations and combinations, including restrictions and identical items where required by the course.
Use combinations in probability calculations for sampling without replacement and related counting problems.
Recognise and apply the geometric distribution as a model for the number of trials until the first success, where included by the specification.

0% read

Calculate probabilities, means and variances for additional discrete distributions included in the course and interpret results in context.

Choose between discrete models by comparing their assumptions, such as independence, constant rate, fixed number of trials or memoryless structure.

This lesson hasn’t been written yet

Maths lessons are written from the official syllabus the first time a learner opens them, then saved for everyone. Sign in and this one is written for you in a minute or two. It’s free.

Sign in Create a free account