Question 1131576
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A fair die is rolled 4 times. What is the probability that a 3 is <U>obtained</U> {{{highlight(cross(don))}}} at least one of the rolls? 
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pay attention on how I edited your post in order to  make sense.



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The COMPLEMENT event is <U>not obtaining a 3 at all</U>, and this complement event has the probability  {{{(5/6)^4}}} = {{{5^4/6^4}}}.

So, the probability under the question is  {{{1 - 5^4/6^4}}} = 0.5177 = 51.77% (approximately).    <U>ANSWER</U>
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Solved.