It depends on why you are keeping two sets of books and what books are they.
Novels Non--fiction.
If you are referring to accountancy then no it is not immoral if the two are identical and kept as a back up. If however, they are different and kept for fraudulant purposes it is not only immoral it is illegal.
The combination of two sets is the Union of the sets and contains all the elements of both sets.
Two requirements (there are many many more than just two) for keeping kosher are:Two sets of everything (pots and pans, dishes, cutlery, etc) - one for meat and one for dairy.A knowledge of accepted hechshers - symbols on commercial food products that indicate they are kosher.
The union of two sets.The union of two sets.The union of two sets.The union of two sets.
what are the two method naming sets
Closed sets and open sets, or finite and infinite sets.
There are two sets of two weeks in 31 days.
Overlapping sets.
The set of elements that are elements of the two (or more) given sets is called the intersection of the sets.
Comparing the relationship of two data sets is needed to see which of the two sets have more life distribution. Two data sets involve the use of simple plotting and contour plots.
god ,and the correct question is, who divided the planests in two sets?
that would be a parallelogram
That is called the UNION of the two sets.