document.write( "Question 881583: there are 5 red balls and 6 black balls in a bowl ,two balls are picked up at random simultaneously. what is the probability of two balls being same colour \n" ); document.write( "

Algebra.Com's Answer #532312 by Fombitz(32388) $\"\"$ $\"About$

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With replacement,
\n" ); document.write( " $\"P%28R%29=5%2F11\"$
\n" ); document.write( " $\"P%28R%2CR%29=%285%2F11%29%285%2F11%29=25%2F121\"$
\n" ); document.write( " $\"P%28B%29=6%2F11\"$
\n" ); document.write( " $\"P%28B%2CB%29=6%2F11%29%286%2F11%29=36%2F121\"$
\n" ); document.write( "So together,
\n" ); document.write( " $\"P=25%2F121%2B36%2F121=61%2F121\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( "Without replacement,
\n" ); document.write( " $\"P%28R%2CR%29=%285%2F11%29%284%2F10%29=2%2F11\"$
\n" ); document.write( " $\"P%28G%2CG%29=%286%2F11%29%285%2F10%29=3%2F11\"$
\n" ); document.write( "So together,
\n" ); document.write( " $\"P=2%2F11%2B3%2F11=5%2F11\"$
\n" ); document.write( " \n" ); document.write( "

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