1.

Show that the set of letters needed to spell “CATARACT” and the set of letters needed to spell “TRACT” are equal.

Answer» Let Set `P` is the set of letters needed to spell `"CATARACT"`. Then,
`P = {C,A,T,R}`
Let Set `Q` is the set of letters needed to spell `"TRACT"`. Then,
`Q = {T,R,A,C}`
As both sets `P` and `Q` are having same elements, it means, `P=Q`.


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