document.write( "Question 1183597: Assume that when adults with smartphones are randomly selected , 44% use them in meetings or classes. If 5 adult smartphone users are randomly selected , find the probability that exactly 2 of them use their smartphones in meetings or classes \n" ); document.write( "

Algebra.Com's Answer #813991 by greenestamps(13203) $\"\"$ $\"About$

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\n" ); document.write( "Straightforward binomial probability....

\n" ); document.write( "The probability that each person uses his phone in meetings or classes is 0.44, so the probability that he does not is 1-0.44 = 0.56.

\n" ); document.write( "The probability that in any particular group of 5 people 2 of them use their phones in meetings or classes (and 3 do not) is then $\"%280.44%5E2%29%2A%280.56%5E3%29\"$

\n" ); document.write( "Finally, the number of ways of choosing 2 of the 5 people to be the ones that use their phones in meetings or classes is C(5,2).

\n" ); document.write( "So the probability that 2 out of 5 chosen people use their phones in meetings or classes is

\n" ); document.write( " $\"C%285%2C2%29%2A%280.44%5E2%29%2A%280.56%5E3%29\"$

\n" ); document.write( "Use a calculator....

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