Problema Solution
A university bookstore recently sold a wirebound graph-paper notebook for $2.50, and a college-ruled notebook for $2.30. At the start of spring semester, a combination of 50 of these notebooks were sold for a total of $118.60. How many of each type were sold?
Answer provided by our tutors
graph notebook is $2.5 rulesnotedbook is 2.3
Let g be the graph books and r be the ruled ones
g + r = 50
also given 2.5 * g + 2.3 * r = 118.6
2.5 *g + 2.3 ( 50-g) = 118.6
.2 g = 118.6 - 115
g = 18 books
So r = 50 - 18 = 32 books