Q. 15.0( 1 Vote )

If A = {5, {5, 6}

Answer :

In the given set we have been given that 2 elements and 1 set

Elements are 5, 7 and {5,6} is the set

So, {5,6} ∈ A.

All the other options are not correct

Because {5} is a set not an element, so it does not belongs to A , but 5 ∈ A

In the same way {6}, {7} are sets not elements.

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