SOLUTION: Suppose you have not attended classes or done any homework for a course in which you are to write a four-question true/false quiz where each question has two choices. Therefore,

Algebra ->  Probability-and-statistics -> SOLUTION: Suppose you have not attended classes or done any homework for a course in which you are to write a four-question true/false quiz where each question has two choices. Therefore,      Log On


   

Question 1191037: Suppose you have not attended classes or done any homework for a course in which you
are to write a four-question true/false quiz where each question has two choices. Therefore,
you have to guess on every question and have a 1/2 chance of getting each question correct.
a. What is the probability that you get a mark of 100% on the quiz?
b. What is the probability that you pass the quiz (ie, you get a mark of at least 50%)
Answer by Solver92311(821) About Me  (Show Source):
You can put this solution on YOUR website!


The probability of successes in independent trials where the probability of success on any given trial is is given by:



where is the number of combinations of things taken at a time and is equal to

For part a, you need to calculate .

For part b, you need to calculate either or Note: The second way is less arithmetic.

Also note that , , , , and

John

My calculator said it, I believe it, that settles it

From
I > Ø