document.write( "Question 353513: A Manufacturer makes three models of a television set, models A, B and C. A store sells 40% of a model A sets, 40% of a model B sets, and 20% of model C sets. Of model A sets, 3 % have stereo sound; of model B sets, 7 % have stereo sound; and of model C sets, 9% have stereo sound. If a set is sold at random, find the probability that it has stereo sound. \n" ); document.write( "

Algebra.Com's Answer #252588 by robertb(5830) $\"\"$ $\"About$

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The probability that a set taken is A is 0.40. Since 3% of these have stereo, the probability that a set taken is A with stereo is $\"0.40%2A0.03+=+0.012\"$ .
\n" ); document.write( "Similarly, the probability that a set taken is B with stereo is
\n" ); document.write( " $\"0.40%2A0.07+=+0.028\"$ , and
\n" ); document.write( "the probability that a set taken is C with stereo is $\"0.20%2A0.09+=+0.018\"$ .
\n" ); document.write( "Since these events are mutually exclusive, or disjoint, the probability that a set taken has stereo is $\"0.012+%2B+0.028+%2B+0.018+=0.058\"$ . \n" ); document.write( "

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