8 notebooks cost rs.40 how many notebooks will cost rs.20?
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Let the number of books costing Rs.20 be x.
8 : 40 = x : 20.
X = 8 * 20 / 40
X = 160 / 40
X = 4 books can come in Rs. 20.
8 : 40 = x : 20.
X = 8 * 20 / 40
X = 160 / 40
X = 4 books can come in Rs. 20.
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