6.02 Review of probability fundamentals

Interactive practice questions

A probability of $0.2$0.2 means:

it is impossible for the event to occur

an event is likely to occur.

an event is unlikely to occur.

an event is certain to occur.

Easy

< 1min

A probability of $0.9$0.9 means:

Easy

< 1min

A probability of $0.5$0.5 means:

Easy

< 1min

A probability of $0$0 means:

Easy

< 1min

review probability as a measure of ‘the likelihood of occurrence’ of an event

review the probability scale: 0 ≤ 𝑃(𝐴) ≤ 1 for each event 𝐴, with 𝑃(𝐴) = 0 if 𝐴 is an impossibility and 𝑃(𝐴) = 1 if 𝐴 is a certainty

review the rules: 𝑃(A') = 1 − 𝑃(𝐴) and 𝑃(𝐴∪𝐵) = 𝑃(𝐴) + 𝑃(𝐵) − 𝑃(𝐴∩𝐵)