Saturday
October 25, 2014

Homework Help: Math

Posted by Kim on Wednesday, April 7, 2010 at 5:39am.

10 multiple choice questions each with three possible answers only one of which is correct. A student guesses the answer to every question.

(a)What is the probability that the student will answer the first six questions correctly and the rest incorrectly?
(b)What is the probability that the student will answer the 1st,2nd,4th,6th,7th,and 10th questions correctly and the rest incorrectly?
(c)How many ways can the student get exactly 6 correct answers?
(d)What is the probability that the student answers exactly 6 questions correctly?

Thank you so much for your help...

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