no need this

Consider a branching process whose offspring generating function is 41(3) = (1/6) + (51(6):;2 . Obtain the probability of ultimate extinction. Enter your answer as an integer of the form m or a fraction of the form m. Do not include spaces. To estimate the mean score , of those who took the Medical College Admission Test on your campus, you will obtain the scores of an SRS of students. From published information you know that the scores are approximately Normal with standard deviation about 6.4. You want your sample mean x to estimate , with an error of no more than I point in either direction. What standard deviation must x have so that 99.7% of all samples give an X within 1 point of p? Use the 68-95-99.7 rule. Give your answer to four decimal places