SOLUTION: Calculate the theoretical probability of answering exactly 14 questions correctly on a 30 question exam when the probability of guessing correctly is 0.35? Follow up question: I

Algebra.Com
Question 1200886: Calculate the theoretical probability of answering exactly 14 questions correctly on a 30 question exam when the probability of guessing correctly is 0.35?
Follow up question:
If the minimum passing grade is 21, what is the exact probability that a student passes the exam if they are guessing on each question with a 35% chance of guessing correctly?

Answer by ikleyn(52879)   (Show Source): You can put this solution on YOUR website!
.
Calculate the theoretical probability of answering exactly 14 questions correctly
on a 30 question exam when the probability of guessing correctly is 0.35?
~~~~~~~~~~~~~~~~~~~

It is the Binomial type a probability problem


    P =  =  = 0.06112  (rounded).   ANSWER

Solved.

-------------

For the following up question/questions, please post it/them in separate post/posts - for your sake.

=============

To see many other similar  (and different)  solved problems,  look into the lessons
    - Simple and simplest probability problems on Binomial distribution
    - Typical binomial distribution probability problems
in this site.

Learn the entire subject from there.




RELATED QUESTIONS

In a multiple choice exam of 100 questions, 4 possible answers were assigned for each... (answered by ewatrrr)
On a 33 question exam, what is the probability of three students answering the same 22... (answered by richard1234)
Suppose that an exam has 10 True or False questions. Suppose that a student who... (answered by ikleyn)
A test consists of 10 true-or-false questions. An answer is randomly chosen for each... (answered by Fombitz,ewatrrr)
A contestant correctly answered 9 of 12 questions correctly. Find the probability of the... (answered by richard1234)
Assume that on a standardized test of 100 questions, a person has a probability of 85% of (answered by stanbon)
Assume that on a standardized test of 100 questions, a person has a probability of 80% of (answered by stanbon)
A student correctly answered 9 out of 12 questions, what is the probability of her... (answered by Alan3354)
An exam consists of 20 multiple choice questions, each with 5 answer choices. If a... (answered by ikleyn)