Final answer:
Approximately 33.33% of the girls who play sports play both volleyball and basketball.
Step-by-step explanation:
To find the percentage of girls who play both volleyball and basketball, we need to find the total number of girls who play sports and the number of girls who play both sports. Then, we can divide the number of girls who play both sports by the total number of girls who play sports and multiply by 100 to find the percentage.
Given the information in the question:
- 28 girls play only volleyball
- 32 girls play only basketball
- 20 girls play both sports
We can add the number of girls who play only volleyball and the number of girls who play only basketball to find the total number of girls who play sports: 28 + 32 = 60.
Now, we can divide the number of girls who play both sports (20) by the total number of girls who play sports (60): 20/60 = 1/3 = 0.3333.
Multiplying by 100, we find that approximately 33.33% of the girls who play sports play both volleyball and basketball.