2u question (Manly 2020) (1 Viewer)

[yepImhere]

Could anyone give me some help with ii)? I figured out part i)

 

[synthesisFR]

ngl idk how to do y11 probability for advanced (is this concerning for ext 1 binomial distribution someone reply just in case)

uh these formula are on the data sheet so u can work it out here
i forgot what the Up down U and thing means lol but u can prob work it out

 

[cossine]

ngl idk how to do y11 probability for advanced (is this concerning for ext 1 binomial distribution someone reply just in case)
View attachment 40242
uh these formula are on the data sheet so u can work it out here
i forgot what the Up down U and thing means lol but u can prob work it out

If you ever have time you might find discrete math by sussana e.p. interesting. Anyhow the upside down U is the intersection operator in set theory.

https://en.wikipedia.org/wiki/Set_theory

 

[Luukas.2]

View attachment 40241

Could anyone give me some help with ii)? I figured out part i)

If A and B are mutually exclusive (i.e. non-overlapping, as shown in the illustration posted above, then A' (everything not in A) intersects with B for everything in B and nothing else.

Thus, P(A' AND B) = P(B)

 

[SB257426]

View attachment 40241

Could anyone give me some help with ii)? I figured out part i)

if a and b are mutually exclusive then they have no common elements between them. So this must mean that A' intersection B is the same as P(B).

So answer is 1/4

 

[synthesisFR]

help how someone explain whats A'
AMM I MEANT TO KNOW THIS FOR ExT 1

 

[Luukas.2]

if a and b are mutually exclusive then they have no common elements between them. So this must mean that A' intersection B is the same as P(B).

So answer is 1/4

Yes

help how someone explain whats A'
AMM I MEANT TO KNOW THIS FOR ExT 1

A' is another notation for not A or A with a bar over it

 

[user18181818]

if a and b are mutually exclusive then they have no common elements between them. So this must mean that A' intersection B is the same as P(B).

So answer is 1/4

why can't it also be the same as P(a') which is 1-3/5 =2/5?

 

[carrotsss]

why can't it also be the same as P(a') which is 1-3/5 =2/5?

Not all instances of A’ are B as well, B is like a smaller circle within A’

 

[SB257426]

why can't it also be the same as P(a') which is 1-3/5 =2/5?

because when you are taking 1- p(A) you are looking at everything that is not inside A. Since events are mutually exclusive you are looking at the entities within the circle B and outside the circles

 

[SB257426]

because when you are taking 1- p(A) you are looking at everything that is not inside A. Since events are mutually exclusive you are looking at the entities within the circle B and outside the circles

but the question is asking A' intersection B so u are only looking at the common elements in A' and B which is only B