Question 1194572
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Question #9: Working Women and Computer Use
It is reported that 72% of working women use computers at work. 
Choose 5 working women at random. Find
a. The probability that at least 1 doesn’t use a computer at work
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<pre>
The probability that one randomly selected working women uses a computer at work is 0.72,
according to the problem.


The probability that of 5 randomly selected working women all 5 use computers at work
is  {{{0.72^5}}} = 0.193492 (rounded).


The probability that of 5 randomply selected working women at least one doesn't use a computer 
at work is the complement to it

    P = 1 - {{{0.72^5}}} = 1 - 0.193492 = 0.806508 = 80.6508%.    <U>ANSWER</U>
</pre>

Solved.


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To see many other similar &nbsp;(and different) &nbsp;solved problems of this type, &nbsp;look into the lessons

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/Probability-and-statistics/Solving-probability-problems-using-complementary-probability.lesson>Solving probability problems using complementary probability</A> 

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/Probability-and-statistics/Solving-probability-problems-using-complementary-probability-REVISITED.lesson>Solving probability problems using complementary probability REVISITED</A> 

in this site.


Learn the subject from there.