document.write( "Question 868500: 10. A population survey shows that 40% are Young, 35% are Middle aged, and the rest are Seniors. Among the Young, 60% smoke. Among the Middle aged, 40% smoke, while among the Seniors 20% smoke. Find the probability that a person in this survey:\r
\n" ); document.write( "\n" ); document.write( "a) a middle aged smoker
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\n" ); document.write( "c) a smoker
\n" ); document.write( "d) a smoker given that he/she is a senior
\n" ); document.write( "e) a senior given that he/she smokes
\n" ); document.write( "f) young or a smoker \r
\n" ); document.write( "\n" ); document.write( "I have the answers I just don't understand how to do it \n" ); document.write( "

Algebra.Com's Answer #523591 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( "Recommend making a table to keep track...
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document.write( "Age     % of Pop  %whosmoke   % of Entire Pop for each
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document.write( "Young     .40       .60          .24    (.40*.60)
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document.write( "Middle    .35       .40          .14
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document.write( "Seniors   .25       .20          .05
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document.write( "                                 .43 (sum)
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document.write( "a) a middle aged smoker: P(MA smoker) = .14
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document.write( " b) a senior non smoker: P(S nonsmoker) = 1 - .05 = .95  0r 95%
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document.write( " c) a smoker P = .43
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document.write( " d) a smoker given that he/she is a senior: P = .05/.25
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document.write( " e) a senior given that he/she smokes:    P =  .05/.43
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document.write( " f) young or a smoker: P =  .40 + .43 - .24 \n" );
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