Neco 2021 Further Mathematics Question 23

Practice objective / multiple choice question 23 from the 2021 Neco Further Mathematics examination.

Neco 2021 Further Mathematics Objective / Multiple Choice Hard Difficulty
Question 23 NECO • 2021 • FURTHER_MATHEMATICS • objective

Each of 5 multiple‑choice questions is attempted independently. For any question the probability that the student knows the answer is 0.6; if known the answer is correct, otherwise the student guesses randomly among 4 options. The student passes if at least 4 questions are answered correctly. (a) What is the probability that the student passes the exam? (b) If a randomly selected answered question is known to be correct, what is the probability that the student actually knew the answer to that question?

Answer Options

Correct Answer A. Pass probability = 26411/50000; Knowledge probability = 6/7
B. Pass probability = 27000\/50000; Knowledge probability = 2\/3
C. Pass probability = 26000\/50000; Knowledge probability = 5\/7
D. Pass probability = 25000\/50000; Knowledge probability = 7\/8
Correct Answer
A
Correct Option:
Pass probability = 26411/50000; Knowledge probability = 6/7

About This Question

This is Neco 2021 Further Mathematics Question 23. It is one of the objective questions from the 2021 Neco Further Mathematics examination.

Difficulty level: Hard .

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