document.write( "Question 1178818: If p(a)= .6, p(b)= .22, and p(a and b)= .31 . Find p(a and b) \n" ); document.write( "

Algebra.Com's Answer #808225 by MathLover1(20850) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "given:\r
\n" ); document.write( "\n" ); document.write( " $\"p%28a%29=+.6\"$ , $\"p%28b%29=+.22\"$ , and $\"p\"$ ( $\"a\"$ and $\"b\"$ )= $\"+.31\"$ . \r
\n" ); document.write( "\n" ); document.write( "Find $\"p\"$ ( $\"a\"$ and $\"b\"$ )-> doesn't make sense, it's already given\r
\n" ); document.write( "\n" ); document.write( "assuming you need to find $\"p\"$ ( $\"a\"$ or $\"b\"$ ), use\r
\n" ); document.write( "\n" ); document.write( "General Addition Rule\r
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\n" ); document.write( "\n" ); document.write( " $\"p\"$ ( $\"a\"$ or $\"b\"$ ) = $\"P%28A%29+%2B+P%28B%29\"$ - $\"p\"$ ( $\"a\"$ and $\"b\"$ )\r
\n" ); document.write( "\n" ); document.write( " $\"p\"$ ( $\"a\"$ or $\"b\"$ ) = $\".6+%2B+.22+-+.31\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"p\"$ ( $\"a\"$ or $\"b\"$ ) = $\"+0.51\"$ \r
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