To determine in which year the percentage of successful students was the least, we need data on the percentage of successful students for each year. Without this data, I can't provide a specific answer.
Regarding the second question, if 50 students appeared for the exam, and we know the percentage of successful students, we can find the number of unsuccessful students by subtracting the number of successful students from the total number of students.
Let's say the percentage of successful students is
p
%
p%. Then, the number of successful students would be:
Number of successful students
=
p
100
×
50
Number of successful students=
100
p
×50
The number of unsuccessful students would be:
Number of unsuccessful students
=
50
−
Number of successful students
Number of unsuccessful students=50−Number of successful students
If you provide the percentage of successful students, I can calculate the number of unsuccessful students accordingly.
