Question 1177214
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The arrangement of the other 7 balls has nothing to do with the problem.<br>
P(different colors on each end) = P((white first AND black last) OR (black first AND white last))<br>
{{{(5/9)(4/8)+(4/9)(5/8) = 20/72+20/72 = 40/72 = 5/9}}}<br>