document.write( "Question 1204883: A bag contains of 45 markers of which 15 are pink. If you select 2 at random, without replacement, find the probability that:
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Algebra.Com's Answer #841419 by ikleyn(52847) $\"\"$ $\"About$

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\n" ); document.write( "A bag contains $\"highlight%28cross%28of%29%29\"$ 45 markers of which 15 are pink. If you select 2 at random,
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\n" ); document.write( "\n" ); document.write( "a) Neither is pink.\r
\n" ); document.write( "\n" ); document.write( "b) At least one of the markers is pink.
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document.write( "(a)  The total number of all possible pairs is   =  = 990.\r\n" );
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document.write( "     If neither of randomly selected markers is pink, it means that all selected pairs are not pink.\r\n" );
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document.write( "     It means that they are from the set of 45-15 = 30 non-pink markers.\r\n" );
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document.write( "     The number of such pairs is   =  = 435.\r\n" );
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document.write( "     The probability \"neither is pink\" is the ratio   =  = .    ANSWER\r\n" );
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document.write( "(b) This probability is the complement to the probability found in (a)\r\n" );
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document.write( "          = 1 -  = 1 -  =  = .    ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "Using complementary probability is very productive method for solving many similar problems.\r
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\n" ); document.write( "\n" ); document.write( "To see many other similar (and different) solved problems of this type, look into the lessons\r
\n" ); document.write( "\n" ); document.write( " - Solving probability problems using complementary probability \r
\n" ); document.write( "\n" ); document.write( " - Solving probability problems using complementary probability REVISITED \r
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