If A={1, 2, 3, 4, 5}, B={2, 4, 6, 8} then find n(AUB)-n(A,B).
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Answer:
n(A∪B) - n(A∩B) = 5
Step-by-step explanation:
A={1, 2, 3, 4, 5}, B={2, 4, 6, 8}
A∪B = {1, 2, 3, 4, 5} ∪ {2, 4, 6, 8}
= {1, 2, 3 , 4 , 5 , 6 , 8}
n(A∪B) = 7 (no. of elements )
A ∩ B = {1, 2, 3, 4, 5} ∩ {2, 4, 6, 8}
= { 2, 4}
n(A∩B) = 2
n(A∪B) - n(A∩B)
= 7 - 2
= 5
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