I want to solve the following equation for x p=a*exp(-x^2/2)+b*P(Z>x)
where p,a,b are known, Z is a standard normal variable. Clearly there is no analytic form for P(Z>x). I am wondering if any expert could direct one easy way on this. Thank you. ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html