MATH 210

A physics professor wants to know what percent of physics majors will spend the next several years doing post-graduate research. He has the following probability distribution. X P(x) X*P(x) 1 0.40 2 0.25 3 0.10 4 5 0.10 6 0.05 Find the probability that a physics major will do post-graduate research for at most three years. (Enter an exact number as an integer, fraction, decimal.) P(x