5 pts A scientist is testing 120 samples of Copper (Cu) dug out from a mine randomly to assess purity. In the scientist's research, they discover roughly 65% of the samples are pure copper. Determine the probability that among the 120 samples that fewer than 72 are pure copper. Hint: Calculate the mean, standard deviation, and upper and lower boundaries according to normal approximation of the binomial theorem. .1014 O 0912 .1136 ,1067