Original post by Qer
The events A and B are such that P(A) =
5
2
, P(B) =
2
1
and P(AB′) =
5
4
.
(a) Find
(i) P(A ∩ B′),
(ii) P(A ∩ B)
need help in part 2
5
2
, P(B) =
2
1
and P(AB′) =
5
4
.
(a) Find
(i) P(A ∩ B′),
(ii) P(A ∩ B)
need help in part 2
are the numbers 52,21,54? or just 5 and 4 and 2 separately?
Original post by sayema1
are the numbers 52,21,54? or just 5 and 4 and 2 separately?
sorry, i just correct them
Original post by Qer
sorry, i just correct them
oh ok
Original post by Qer
The events A and B are such that P(A) =2/5
, P(B) =1/2
and P(A I B′) =4/5
.
(a) Find
(i) P(A ∩ B′),
(ii) P(A ∩ B)
need help in part 2
, P(B) =1/2
and P(A I B′) =4/5
.
(a) Find
(i) P(A ∩ B′),
(ii) P(A ∩ B)
need help in part 2
is the ans 1/5 ?
Original post by sayema1
is the ans 1/5 ?
no
answer is zero
i also think that it is 1/5 but it is zero
Original post by Qer
no
answer is zero
i also think that it is 1/5 but it is zero
answer is zero
i also think that it is 1/5 but it is zero
maybe because A and B are mutually exclusive
Original post by sayema1
maybe because A and B are mutually exclusive
but they don't mention in question
in next part they asked about relationship but now we have to show them what p(AnB) actually is
Original post by sayema1
btw where did u get this ques from?
jan 2004
but i don't post full question here
Original post by Qer
but they don't mention in question
in next part they asked about relationship but now we have to show them what p(AnB) actually is
in next part they asked about relationship but now we have to show them what p(AnB) actually is
oh okhay i will check and i will let you know
Original post by Qer
The events A and B are such that P(A) =2/5
, P(B) =1/2
and P(A I B′) =4/5
.
(a) Find
(i) P(A ∩ B′),
(ii) P(A ∩ B)
need help in part 2
, P(B) =1/2
and P(A I B′) =4/5
.
(a) Find
(i) P(A ∩ B′),
(ii) P(A ∩ B)
need help in part 2
have you done 1?
what did you get?
Original post by glad-he-ate-her
have you done 1?
what did you get?
what did you get?
2/5
Original post by Qer
in part 1 i got answer p(AnB'
= 2/5 which is equal to p(a) it means if i remove p(b) it doesn't effect p(a) so it shows they don't intersect or they nothing have common
I THINK
is this is sensible reason??
= 2/5 which is equal to p(a) it means if i remove p(b) it doesn't effect p(a) so it shows they don't intersect or they nothing have commonI THINK
is this is sensible reason??
yes, i was just about to tell you if the probability of A= Probability of A and not B, that suggests the events are mutually exclusive
Original post by glad-he-ate-her
yes, i was just about to tell you if the probability of A= Probability of A and not B, that suggests the events are mutually exclusive
thanks for clarification
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