## Pulsified333 one year ago Suppose that A and B are sets with n(A′)=431,n(B′)=441,n((A∪B)′)=354, and n(U)=557. Find the following: n(A)= n(B)= n(A∪B)= 203 n(A∩B)= n(A∩B′)= n(A′∩B)= n(A′∩B′)= 354

1. Pulsified333

i think i found two answers so far

2. Pulsified333

@dan815

3. dan815

okay which ones u want help with right now

4. Pulsified333

Everything basically

5. Pulsified333

actually maybe just A' and B' . I may be able to figure it out from there

6. dan815

|dw:1443068270473:dw|

7. Pulsified333

B does not equal 77 though

8. Pulsified333
9. dan815

|dw:1443068444096:dw|

10. dan815

i wouldnt trust all that addition lol i just did it all in my head so -,- prolly made some mistakes

11. Pulsified333

I know that A U B has to equal 203

12. Pulsified333

but B doesn't equal 77

13. dan815

why

14. Pulsified333

did you see the picture

15. Pulsified333

the website says its wrong

16. Pulsified333

I don't understand how it isn't 77

17. dan815

they made a mistake just try 87 for B

18. Pulsified333

19. dan815

flip it 77 for A and 87 for B

20. dan815

21. Pulsified333

77 doesn't work for A either

22. dan815

ohh lmao all of A oops

23. Pulsified333

could A and B be disjoint?

24. dan815

77+39 obviously

25. dan815

why did we even get 77 from

26. dan815

i mean 87+39 for A and 77+39 for B

27. Pulsified333

oh

28. Pulsified333

now only two left https://gyazo.com/04f300cc9a4d47126c41d750837b2361

29. dan815

a interset b not is 87

30. dan815

and the other is 77

31. Pulsified333

is n(A∩B′)= |dw:1443069216495:dw|?

32. Pulsified333

so everything not in B?

33. dan815

B' means everything not in B

34. dan815

what part of everything not in B is in A?

35. dan815

|dw:1443069320930:dw|

36. dan815

|dw:1443069372800:dw|

37. Pulsified333

39 is in A

38. dan815

87 indicates the part that is only in A

39. dan815

did you try 87

40. dan815

was it wrong ?

41. Pulsified333

sorry thats what I meant

42. Pulsified333

so n(A∩B′)= 87 n(A′∩B)= 77

43. dan815

ya

44. Pulsified333

:D thank you dude so much :D

45. dan815

sure baby