About two-thirds of companies in America test newly-hired employees for drugs, and 3.8% of those prospective employees test positive (based on data from the American Management Association). The Sigma Electronics Company tests 150 prospective employees. If the 3.8% is assumed to be accurate, find the probability that 20 or more (out of 300) will test positive. What is the chance that less than ten will test positive ? Use the normal approximation to the binomial