document.write( "Question 608516: There are 67 students in a chemistry class. The instructor selects a student at random.
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\n" ); document.write( "\n" ); document.write( "a) What is the probability that he chooses a sophomore or a female?\r
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\n" ); document.write( "\n" ); document.write( "b) What is the probability that he chooses someone who is male and a junior?\r
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\n" ); document.write( "\n" ); document.write( "c) If a female is selected at random what is the probability that she is a freshmen?\r
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Algebra.Com's Answer #383259 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi
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document.write( "	m	f	Tot
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document.write( "Fr	10	15	25
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document.write( "So	13	3	16
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document.write( "Jr	3	5	8
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document.write( "Sr	2	16	18
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document.write( "Tot	28	39	
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document.write( "a) What is the probability that he chooses a sophomore or a female? 16/67)+ 39/67 - 3/67)= 52/67
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document.write( "b) What is the probability that he chooses someone who is male and a junior? 3/67 
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document.write( "c) If a female is selected at random what is the probability that she is a freshmen? 
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document.write( "P(A|B) = P(A and B)/P(B)
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document.write( "P(Fr|f)= 
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