Ex. n(A)=22, n(B)=13, and n(A U B)=6, then n(A U B)= ?
a. 35
b. 28
c. 29
d. 27
2006-06-06 08:35:16 · 6 answers · asked by theuncommondemominator 1 in Science & Mathematics ➔ Mathematics
upsidedown U means intersection
I'm assuming you mean n(A)=22, n(B)=13, n(A n B)=6
then n(A U B) = n(A) + n(B) - n(A n B) = 29
answer: c
2006-06-06 08:41:08 · answer #1 · answered by coffeecoke 2 · 0⤊ 0⤋
The answer is c, 29. The upside down U mean intersection. So if you are looking for A n B the formulas to calculate A n B is :
A n B=n(A)+n(B)-AUB
So, A n B = 22+13-6=29
2006-06-06 15:39:08 · answer #2 · answered by organicchem 5 · 0⤊ 0⤋
c.29. because,
step 1: in set A, use 22-6=16
step 2: in set B, use 13-6=7
step 3: n(A n B)= 6 so, answer: 16+6+7= 29!
2006-06-07 00:03:50 · answer #3 · answered by janice55 2 · 0⤊ 0⤋
This symbol means the intersection of two sets of elements which mean the common elements between the two sets
n(A U B)= n(A)+n(B) - n(A intersect B)
= 22 + 13 - 6 = 29
The right answer is c.
2006-06-06 15:42:39 · answer #4 · answered by a_ebnlhaitham 6 · 0⤊ 0⤋
An upsidedown U is notation for set intersection. That is, only elements belonging to both A and B belong to A 'intersect' B.
2006-06-06 16:43:31 · answer #5 · answered by mr_wonderful 3 · 0⤊ 0⤋
Set intersection
http://en.wikipedia.org/wiki/Intersection_%28set_theory%29
(Sorry for giving a Wikipedia link - if I knew anything about set theory I'd explain it myself!)
2006-06-06 15:38:51 · answer #6 · answered by bonshui 6 · 0⤊ 0⤋