document.write( "Question 955509: 3 balls were chosen from a bag containing 5 red, 3 green, and 4 blue balls. What is the probability that at-least one ball is red? \n" ); document.write( "

Algebra.Com's Answer #583730 by Fombitz(32388) $\"\"$ $\"About$

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Let's find the probability that no balls are red.
\n" ); document.write( "Then the complement will have at least one red ball.
\n" ); document.write( " $\"P%28NR1%29=7%2F12\"$
\n" ); document.write( " $\"P%28NR2%29=6%2F12\"$
\n" ); document.write( " $\"P%28NR3%29=5%2F12\"$
\n" ); document.write( "So then,
\n" ); document.write( " $\"P%28NR%29=%287%2F12%29%286%2F12%29%285%2F12%29\"$
\n" ); document.write( " $\"P%28NR%29=35%2F288\"$
\n" ); document.write( "So then,
\n" ); document.write( " $\"P=1-P%28NR%29\"$
\n" ); document.write( " $\"P=288%2F288-35%2F288\"$
\n" ); document.write( " $\"P=253%2F288\"$ \n" ); document.write( "

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