MENU
Question -

On a multiple choice examination with three possible answers for each of the five questions, what is the probability that a candidate would get four or more correct answers just by guessing?



Answer -

In this question, wehave the repeated correct answer guessing form the given multiple choicequestions are Bernoulli trials

Let us now assume, Xrepresents the number of correct answers by guessing in the multiple choice set

Now, probability ofgetting a correct answer,┬аp = 1/3

Thus, q = 1 тАУ p = 1 тАУ1/3 = 2/3

Clearly, we have X isa binomial distribution where n = 5 and┬аP = 1/3

Comment(S)

Show all Coment

Leave a Comment

Free - Previous Years Question Papers
Any questions? Ask us!
×