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Mole Concept & Avogadro Number

If U = 1, 2, ...

Question

If U = {1, 2, 3, 4, 5} and A = {2, 5, 1}. The number of elements in a set A' is ___.

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Solution

The correct option is B 2
-

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Similar questions

If set A = {1, 2, 3} and set B = {2, 3, 5, 7}. Then the number of elements in A $\times$ B is ___

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