Consider a population that is 30% left handed. You need to order chairs for a lecture hall for 100 students where left handed chairs are different from the right handed ones. At least how many left...

Consider a population that is 30% left handed. You need to order chairs for a lecture hall for 100 students where left handed chairs are different from the right handed ones. At least how many left handed chairs do you need to order to accommodate left handed people 99.85% of the times when all seats are taken? Use the empirical rule in your calculation and round your answer to the nearest integer that will work.