Tisha have 72 books in all.
Step-by-step explanation:
Given,
Number of shelving units = 2
One shelving unit has 3 shelves.
2 shelving units will have = 3*2 = 6 shelves
Books hold by each shelf = 12 books
Books hold by 6 shelves = 12*6 = 72 books
As the shelves are filled with books, therefore,
Tisha have 72 books in all.
Keywords: multiplication
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