Question 1166117
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From the condition, it is with equal probability of  {{{1/2}}}  the difference is positive or negative.


In other words, it is with equal probability of  {{{1/2}}}  we will have increase or decrease in closing every day.


The probability to have INCREASE at closing 5 days in a row is THUS  {{{1/2^5}}} = {{{1/32}}}.    <U>ANSWER</U>
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Solved.


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