Probability Problem

[Mancolt]

I need some help with this probability problem.

On any given day, Jen will sell 85% of her baked goods. For a sample of 500 potential customers, what is the probability that Jen will sell to 90% of them? Assume that the number of customers she usually sells to is normally distributed with mean 425 and standard deviation 50.

Thanks so much for any help.

[Mancolt]

I was able to figure this out. Just took awhile.