Obviously, smth is wrong with my brain, but I couldn't understand the OA...
When 1,000 children were inoculated with a certain vaccine, some developed inflammation at the site of the inoculation and some developed fever. How many of the children developed inflammation but not fever?
1. 880 children developed neither inflammation nor fever
2. 20 children developed fever
The answer is C, combine the 2 statements and its sufficient