‹ Back to the paper
Answer the following.
A school offers students the choice of three modes for attending classes: • Mode A: Offline…
A school offers students the choice of three modes for attending classes:
• Mode A: Offline (in-person) – 40% of students
• Mode B: Online (live virtual classes) – 35% of students
• Mode C: Recorded lectures – 25% of students
After a feedback survey:
• 20% of students from Mode A reported the class as “Excellent”
• 30% from Mode B rated it as “Excellent”
• 50% from Mode C rated it as “Excellent”
A student is selected at random from the entire group, and it is found that they rated the class as “Excellent.” (Analysis)
(a)[1.3333333333333333]
Represent the data in terms of probability. Define the events clearly.
(b)[1.3333333333333333]
Using Bayes’ Theorem, find the probability that the student attended the Recorded lectures (Mode C), given that they rated the class as “Excellent.”
(c)[1.3333333333333333]
Interpret your result. Which mode has the highest likelihood of being chosen if a student says “Excellent”?
Answer
No answer yet.
From ISC 2026 Specimen Mathematics Paper 1, question 10(ii).