Solution
\(A) \text{Total students in survey}=\text{Grade 6 students}+\text{Grade 8 students}+\text{Grade 10 students}=23+39+38=100\)

B) 18 students from Grade8 prefer gym in morning.

C) 38 students from Grade 10 participated in survey.

\(D)\text{Students Prefer Gym in Afternoon}=8+21+26=55\)

B) 18 students from Grade8 prefer gym in morning.

C) 38 students from Grade 10 participated in survey.

\(D)\text{Students Prefer Gym in Afternoon}=8+21+26=55\)