Quick questions on Probability: addition and multiplication laws, conditional probability and Bayes' theorem - SQA Advanced Higher Statistics

2short 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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A

and

B

are mutually exclusive with

P(A)=0.35

and

P(B)=0.25

. Find

P(A\cup B)

. [1 mark]

What is q2?

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A fair coin is tossed three times. Find the probability of at least one head. [2 marks]

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