The ratio of plain to lined books sold in store C is 5 : 4 5 : 4 5 : 4 , and in store B it is 3 : 2 3 : 2 3 : 2 . find the total number of plain books...
Question

The ratio of plain to lined books sold in store C is , and in store B it is . find the total number of plain books sold by these two stores together.