The cost of 5 books is $750 .What is the cost of 3 books
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cost of 5 books : $750
cost of 1 book : $750/5
:$150
cost of three book:3* 150
:$450
hence cost of 3 book is $450
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Cost of 5 books = $750
Cost of 3 books = ?
METHOD 1:
Cost of 1 book = 750/5
= $150
So,
Cost of 3 books = 150×3
= $450
METHOD 2:
5 : 750 :: 3 : x
x = 750×3/5
= 2250/5
= $450
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