Xiao Ming, Xiao Li and Xiao Xiao Li all like to collect stamps. Each of them has 45 stamps on average. The ratio of stamps of Xiao Lu, Xiao Ming and Xiao Li is 5:7:3. How many stamps do they each have?
Suppose X
5X+7X+3X=135
X=9
So there are 45 Xiaoming, 63 Xiaoli and 27 Xiaoli
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