document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=899355>Question 899355</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a recent study, it was found that 40% of customers are unsatisfied with their bank. In a sample of 25 customers, what is the probability of finding at least 15 unsatisfied customers? </SPAN>\n" );
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document.write( "In a recent study, it was found that 40% of customers are unsatisfied with their bank. In a sample of 25 customers, what is the probability of finding at least 15 unsatisfied customers?<BR>\n" );
document.write( "A:<BR>\n" );
document.write( "Let X = number of unsatisfied customers in a sample of 25 customers<BR>\n" );
document.write( "X ~ Binomial (n = 25, p = 0.4)<BR>\n" );
document.write( "P(X &#8805; 15) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sum%28%28matrix%282%2C1%2C25%2Cx%29%29%280.4%5Ex%29%280.6%5E%2825-x%29%29%2Cx=15%2C25%29 ALIGN=MIDDLE  ALT=\"sum%28%28matrix%282%2C1%2C25%2Cx%29%29%280.4%5Ex%29%280.6%5E%2825-x%29%29%2Cx=15%2C25%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%280.0344%29 ALIGN=MIDDLE  ALT=\"highlight%280.0344%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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