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What is the probabilty to guess 12 questions out of 15 to be correct if the quiz is muliple choice A, B, C, D?

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Question

What is the probabilty to guess 12 questions out of 15 to be correct if the quiz is muliple choice A, B, C, D?

Expert Solution

Step 1

We need to take Combinations and binomial probability distribution to find the solution.

For that, we can use the formula $P^{c} Q^{(n - c)} \times {}^{n}C_{c}$

Where P is the probability of success and Q is the probability of failure.

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