SOLUTION: A test consists of fifteen true/false questions.
A student who forgot to study guesses randomly
on every question. What is the probability that
the student answers exactly five
Algebra.Com
Question 1106041: A test consists of fifteen true/false questions.
A student who forgot to study guesses randomly
on every question. What is the probability that
the student answers exactly five questions
correctly?
Found 2 solutions by Boreal, josmiceli:
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
This is 15C5, the number of ways 5 can be correct from 15, *(1/2)^5*(1/2)^10=0.0916
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
is the number of possible test results
The number of test results with correct answers is:
C( 15,5 ) =
C( 15,5 ) =
C( 15,5 ) =
C( 15,5 ) =
C( 15,5 ) =
C( 15,5 ) =
( I lost my calculator -you can calculate )
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