Question 1161141
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Sam's teacher gives a warm-up question every day. When it is a true-false question, he gets the answer 
correct 65% of the time. When it is a multiple-choice question, he gets the answer correct 75% of the time. 
It is a multiple-choice question 80% of the time, and a true-false question 20% of the time. 
Same answered the question correctly today, what was the probility it was a multiple-choice question? 
THANK YOU in advance for any help:) 
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<pre>
    P = {{{(0.8*0.75)/(0.8*0.75 + 0.2*0.65)}}} = 0.8219 = 82.19%.    <U>ANSWER</U>
</pre>

Solved.