Quick questions on Conditional probability: the conditional formula, dependence and independence - CCEA A-Level Mathematics

3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?

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Given

P(A \cap B) = 0.12

and

P(B) = 0.3

, find

P(A \mid B)

. [2 marks]

What is q2?

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Events have

P(A) = 0.5

P(B) = 0.4

P(A \cap B) = 0.2

. Are they independent? [2 marks]

What is q3?

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Write the general multiplication rule for

P(A \cap B)

. [1 mark]

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