CBSE Class 11-science Answered
If A = {3, 5, 11}, B = {2, 7, 9} then n(A union B) =
Asked by | 09 Apr, 2010, 04:05: PM
Expert Answer
A U B={3,5,11,2,7,9}
So
n(AUB)=6....... i.e. the number of elements of the set AUB is 6.
alt method
n(AUB)=n(A)+n(B)-n(A intersection B)
but in this case, A int B is an empty set.
so n(A int B)=0
so y this formula also you get answer
3+3-0=6
so n(AUB)=6
Answered by | 10 Apr, 2010, 06:47: AM
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