document.write( "Question 753422: Lisa has 9 rings in her jewelry box. 5 are gold and 4 are silver. If she randomly selects 3 rings to wear to a party,find each probability.\r
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document.write( "14. P ( all gold or all silver)\r
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document.write( "and 16: P( at least 1 silver)\r
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document.write( "Can you show me the steps to complete this? \n" );
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Algebra.Com's Answer #458390 by rothauserc(4718)![]() ![]() You can put this solution on YOUR website! Lisa has 9 rings in her jewelry box. 5 are gold and 4 are silver. If she randomly selects 3 rings to wear to a party,find each probability. \n" ); document.write( "14. P ( all gold or all silver) \n" ); document.write( "and 16: P( at least 1 silver) \r \n" ); document.write( "\n" ); document.write( "14) what is P for all gold or all silver \n" ); document.write( " P for all gold \n" ); document.write( " first ring is gold, P is 5/9 \n" ); document.write( " second ring is gold, P is 4/8 \n" ); document.write( " third ring is gold, P is 3/7 \n" ); document.write( " P for all gold is (5/9)*(4/8)*(3/7)=.12 or 12% \n" ); document.write( " P for all silver \n" ); document.write( " first ring is silver, P is 4/9 \n" ); document.write( " second ring is silver, P is 3/8 \n" ); document.write( " third ring is silver, P is 2/7 \n" ); document.write( " P for all silver is (4/9)*(3/8)*(2/7)=.05 or 5%\r \n" ); document.write( "\n" ); document.write( "16) P at least 1 is silver has the following possibilities, note that the probability of 1 silver is 4/9 and probability of 1 gold is 5/9 \n" ); document.write( " SGG = (4/9)(5/9)^2 = .14 \n" ); document.write( " GSG = (5/9)^2(4/9) = .14 \n" ); document.write( " GGS = (5/9)^2(4/9) = .14 \n" ); document.write( " SSG = (4/9)^2(5/9) = .11 \n" ); document.write( " SGS = (4/9)^2(5/9) = .11 \n" ); document.write( " GSS = (4/9)^2(5/9) = .11 \n" ); document.write( " SSS = (4/9)^3 = .09\r \n" ); document.write( "\n" ); document.write( "now add all 7 probabilities and our answer is .84 or 84%\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |