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Probability
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anonymous
  • anonymous
Probability
Mathematics
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
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anonymous
  • anonymous
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kropot72
  • kropot72
Which parts are you having trouble with? For example can you do section 1 of the question?
anonymous
  • anonymous
Im having ahard time analyzing 2,4 and 6..

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anonymous
  • anonymous
oh and even 5
anonymous
  • anonymous
Hmm. @kropot72 . The first condition was a' u c.. what does it mean?
kropot72
  • kropot72
Looking at part 1 \[\large A'\cup C\] means the union of the complement of subset A and subset C.
anonymous
  • anonymous
so the answer would be {3,4,5} right?
kropot72
  • kropot72
Not really. The complement of A, denoted by A' is the set of elements which belong to S but do not belong to A. Can you try find A' as a first step in solving part 1 and post your result.
anonymous
  • anonymous
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kropot72
  • kropot72
Your calculation does not have the complement of A, which the question writes as A'. My previous posting explained the meaning of the complement of A. Please refer to it.
kropot72
  • kropot72
S = {1, 2, 3, 4, 5, 6, 7, 8, 9} A = {2, 4, 7, 9} A' = {?, ?, ?, ?, ?}
anonymous
  • anonymous
1,3,,5,6,8,
anonymous
  • anonymous
Oh sorry. The condition was a' u c not s. =)
kropot72
  • kropot72
As you posted, A' = {1, 3, 5, 6, 8} Now what is the union of A' and C?
anonymous
  • anonymous
3,4,5 right?
anonymous
  • anonymous
But what if.. the condition was like this? [a' u c]'.. is it a null set?
kropot72
  • kropot72
Not really. You need to find the union of A' = {1, 3, 5, 6, 8} and C = {2, 3, 4, 5}.
kropot72
  • kropot72
The union of A' and C is the set of all those elements, each one of which belongs to A' or to C, or belongs to both A' and C.
anonymous
  • anonymous
so its 1,2,3,4
kropot72
  • kropot72
Why have you not included 5, 6 and 8?
kropot72
  • kropot72
5 is in A' and C. 6 and 8 are both in C.
anonymous
  • anonymous
Ah yes. Im sorry. Im still digesting this complement thing
anonymous
  • anonymous
How about no. 3? |dw:1435210474368:dw|
kropot72
  • kropot72
np. So we have \[\large A'\cup C={1, 2, 3, 4, 5, 6, 8}\]
kropot72
  • kropot72
With curly brackets at the start and end of the elements.
anonymous
  • anonymous
=)
anonymous
  • anonymous
Ahm. Ill try to answer the no. 3 condition..
anonymous
  • anonymous
is it 1,7,9?
kropot72
  • kropot72
\[\large B\cap C'\] means the intersection of B and the complement of C'. The intersection is the set of all elements common to both B and C'.
anonymous
  • anonymous
the intersection would be 3,5
kropot72
  • kropot72
Yes {1, 7, 9} is correct for section 3.
kropot72
  • kropot72
Sorry, I must log out for a while to eat. Perhaps I can continue later. Hope I have been of some help.
anonymous
  • anonymous
Sure thing @kropot72 Thank you thank you so much =)
kropot72
  • kropot72
You're welcome :)

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