Concept:When price per item is fixed, the total cost is directly proportional to the number of items. Use the unitary method: first find the cost of
1 copy, then multiply by the desired quantity.
Explanation:The total cost of
8 identical books is given as
GH₵16.00.
Since all copies are equally priced, the cost of
1 book is found by dividing the total cost by
8:
Cost of 1 book=8GH₵16.00=GH₵2.00.
To find the cost of
5 books, multiply the cost of
1 book by
5:
Cost of 5 books=GH₵2.00×5=GH₵10.00.
This is consistent because
5 books is less than
8 books, so the cost should be less than
GH₵16.00.
Answer:D.
GH₵10.00