Question 345548
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The probability of anything is the number of ways that it can happen that you would consider a success divided by the number of ways it can happen total -- successes and failures.


There are 30 people in the class -- that is the denominator of your fraction.  Any one of the 20 females, brown eyes or not, is a success plus that half of the males that have brown eyes.  10 males half of which is 5.  So 20 plus 5 is 25 and that is your numerator.  Remember to reduce your fraction.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
My calculator said it, I believe it, that settles it
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