document.write( "Question 1129430: Let C1 C2 and C3 be three mutually disjoint subset of the sample space.
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Algebra.Com's Answer #746012 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "1.  I read  (C1 U C2)C3  as  ((C1 U C2) intersection C3).\r\n" );
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document.write( "    Then, since the subsets  C1, C2 and C3 are mutually disjoint, the subset  (C1 U C2)C3  is empty.\r\n" );
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document.write( "    Therefore  P((C1 U C2)C3) = 0.      ANSWER\r\n" );
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document.write( "2.  Since the subsets  C1  and  C2  are disjoint,  P(C1 U C2) = P(C1) + P(C2).     ANSWER\r\n" );
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