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Typical errors at solution of exercises.
Exercise 7
S. Moiseenko
Find out the models and prices for all the products (of any type) produced by maker B.
One logic mistake, which periodically arises at solving this exercise, is due to
opinion that printer is not considered as a product :-).
I every time refer to the formulation of the exercise trying to find there a flaw,
but I do not find it.
The mistake arises so often that
I have decided to write this FAQ item .
Include models of printers in result set!
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