Question
Let A = {1, 2, {3, 4}, 5}. Is the statement$\{ 1,2,5,\} \subset A$incorrect and why?

Answer

1, 2, 5, are members of set A.
$\therefore ${1, 2, 5} is a subset of set A.$\therefore \{ 1,2,5\} \subset A$is correct.

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