Question 86575: i NEED HELP UNDERSTANDING THESE PROBLEMS...CAN SOMEONE HELP ME THANKS.
write out the sample space, and then write the
indicated events in set notation.
An unprepared student takes a three-question, true/false quiz in which he guesses the
answers to all three questions, so each answer is equally likely to be correct or wrong.
a. The student gets three answers wrong.
b. The student gets exactly two answers correct.
c. The student gets only the first answer correct.
pROBLEM #2
A single fair die is rolled. Find the probabilities of each event.
Getting any number except 3
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! write out the sample space, and then write the
indicated events in set notation.
An unprepared student takes a three-question, true/false quiz in which he guesses the answers to all three questions, so each answer is equally likely to be correct or wrong.
Sample space:
{www,wrr,rwr,rrw,wwr,wrw,rww,rrr}
----------------
a. The student gets three answers wrong.
{www}
----------
b. The student gets exactly two answers correct.
{rrw,rwr,wrr}
-----------------
c. The student gets only the first answer correct.
{rww}
===============
pROBLEM #2
A single fair die is rolled. Find the probabilities of each event.
P(Getting any number except 3) = 5/6
===============
Cheers,
Stan H.
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