(1).x male = 1 drop+1 drop S+1 19+ 1 drop 8+ 17 drop+176544.

The solution is x = 6；;

(Get) If there are 7 girls with a score of/kloc-0 or more among the girls, there are students with poor grades.

There are several ways to get a famous student's test paper: c =1;

All of them have excellent grades, and there are seven ways to get C = 7.

∴ At least 1 is not considered excellent. There are seven ways.

∴ At least 1 The probability of poor grades is 71&; N7 gets p; .