Number of defective zipper = 13
Number of selected zipper = 75
The ratio of the defective zipper to the selected zipper is given by
[tex]\frac{13}{75}[/tex]The number of defective zippers contained in a carton of 300 zippers would be:
[tex]\frac{13}{75}\times300\text{ =52}[/tex]Therefore, the number of defective zippers contained in a carton of 300 zippers is 52. [Option D]
