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.Com
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) (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:
\ =\ {{n}\choose{k}}\cdot(p)^k\cdot(1\,-\,p)^{n-k})
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 \ +\ P(3,4,0.5)\ +\ P(4,4,0,5))
or \ +\ P(1,4,0.5)\))
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
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