Year 12s: what will be the first way you research your future options? >>

Year 12s: what will be the first way you research your future options? >>

Year 12s: what will be the first way you research your future options? >>

Probability

Hi, can I get some help with part b and d

For D I know that A and B are independent = False

and A and C are independent = True

Because A and C are independent pr(AnC) = Pr(A) * Pr(C) = O.5 * 0.8 = 0.4

How do I work out Pr(AnB) because they are independent I can't use the above method I have the formula Pr(AuB) = Pr(A) + Pr(B) - Pr(AnB) but can't use this as I don't know Pr(AuB)

Also why is it that A and B are dependent

and A and C are independent

Thanks

(edited 9 years ago)

Original post by khanpatel321

For b), don't think about independence. (You can use your answers for b) to check whether the events are independent for part d)).

What are the sets

A\cap B

,

A\cap C

and

A\cup B

?

(edited 9 years ago)

OP

Original post by notnek

For b), don't think about independence. (You can use your answers for b) to check whether the events are independent for part d)).

What are the sets

A\cap B

,

A\cap C

and

A\cup B

?

Thank you, it all makes sense now :smile:

:smile:

Quick Reply

Latest

Trending

Trending

Articles for you

The Student Room Group Privacy Notice

What is an LLM and how could it benefit your career?

What is an LLM and how could it benefit your career?

Powerful questions business students forget to ask their career advisers

Powerful questions business students forget to ask their career advisers

Why I chose a law degree and what studying law was like

Why I chose a law degree and what studying law was like