The probability that a person responds to a mailed questionnaire of a survey is 0.6. You mailed out 200 questionnaires. Let X be the number of persons who respond to your mailed questionnaires. The distribution of X is binomial with n = 200 and p = 0.6. Using normal approximation for binomial probability, nd the probability that 150 or more of 200 questionnaires will be returned.