document.write( "Question 1170268: The probability that a family has children is 0.73, the probability that a family has children and owns an iPhone is 0.06, and the probability that a family has children or owns an iPhone is 0.85. Calculate the probability a family owns an iPhone.\r
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Algebra.Com's Answer #795126 by ikleyn(52852) $\"\"$ $\"About$

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\n" ); document.write( "The probability that a family has children is 0.73, the probability that a family has children and
\n" ); document.write( "owns an iPhone is 0.06, and the probability that a family has children or owns an iPhone is 0.85.
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document.write( "    P(or) = P(C) + P(i) - P(and)\r\n" );
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document.write( "    0.85  = 0.73 + 0.06 - P(and)\r\n" );
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document.write( "    P(and) = 0.73 + 0.06 - 0.85 = 0.79 - 0.85 = -0.06.\r\n" );
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document.write( "The probability can not be negative  ---  HENCE, the problem is posed  INCORRECTLY.\r\n" );
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\n" ); document.write( "\n" ); document.write( "It describes a case which NEVER may happen.\r
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