document.write( "Question 950285: A box contains six red pens and three blue pens. (a) A pen is selected at random, the colour is noted and the pen is returned to the box. This procedure is performed a second, then a third time. Find the probability of obtaining (i) three red pens, (ii) two red pens and one blue pen, in any order, (iii) more than one blue pen. \n" ); document.write( "

Algebra.Com's Answer #580249 by Fombitz(32388) $\"\"$ $\"About$

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$\"P%28R%29=6%2F9=2%2F3\"$
\n" ); document.write( " $\"P%28B%29=3%2F9=1%2F3\"$
\n" ); document.write( ".
\n" ); document.write( ".\r
\n" ); document.write( "\n" ); document.write( "I) $\"P%283R%29=P%28R%29%2AP%28R%29%2AP%28R%29=%282%2F3%29%5E3=8%2F27\"$
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\n" ); document.write( "II) RRB, RBR, BRR
\n" ); document.write( " $\"P=P%28RRB%29%2BP%28RBR%29%2BP%28BRR%29\"$
\n" ); document.write( " $\"P=3%2A%282%2F3%29%282%2F3%29%281%2F3%29\"$
\n" ); document.write( " $\"P=4%2F9\"$
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\n" ); document.write( "III) BBR,BRB,RBB,BBB
\n" ); document.write( " $\"P=3%2A%281%2F3%29%281%2F3%29%282%2F3%29%2B%281%2F3%29%281%2F3%29%281%2F3%29\"$
\n" ); document.write( " $\"P=6%2F27%2B1%2F27\"$
\n" ); document.write( " $\"P=7%2F27\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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