document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1197250>Question 1197250</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose a die is rolled twice and let<BR>\n" );
document.write( "A={first toss is a prime} B={second toss is even}<BR>\n" );
document.write( "Find the requested probability.(enter the probability as a fraction)\r<BR>\n" );
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document.write( "P(A n B) </SPAN>\n" );
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document.write( "A={first toss is a prime} <BR>\n" );
document.write( "B={second toss is even}\r<BR>\n" );
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document.write( "set of prime numbers between 1 and 6 = {2, 3, 5}<BR>\n" );
document.write( "set of even numbers between 1 and 6 = {2, 4, 6}\r<BR>\n" );
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document.write( "P(A) = probability that the first toss is a prime<BR>\n" );
document.write( "P(A) = (number of primes between 1 and 6)/(number of faces on the die)<BR>\n" );
document.write( "P(A) = 3/6<BR>\n" );
document.write( "P(A) = 1/2\r<BR>\n" );
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document.write( "P(B) = (number of even numbers between 1 and 6)/(number of faces on the die)<BR>\n" );
document.write( "P(B) = 3/6<BR>\n" );
document.write( "P(B) = 1/2\r<BR>\n" );
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document.write( "P(A n B) = probability both A and B occur<BR>\n" );
document.write( "P(A n B) = P(A)*P(B) which works since the events are independent<BR>\n" );
document.write( "P(A n B) = (1/2)*(1/2)<BR>\n" );
document.write( "P(A n B) = <font color=red>1/4</font><BR>\n" );
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