Ajinkya J. answered 12/17/17
Tutor
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Helping students crack the Ivy league and ace B-schools
The total number of magazines copies at the bookstore = 48
Yesterday, the number of copies sold = 23
The number of copies remained today = 48-23 = 25
Number of copies sold out of what remained = 18
So, the final number of copies left at the bookstore now, = 25 - 18 =7
Hence, 7 copies have left at the bookstore.