Question

A student takes a 13-question, multiple-choice exam with two choices for each question and guesses on each question. Assume the variable is binomial. Round the intermediate and final answers to three decimal places Find the probability of guessing at least 9 out of 13 correctly P (guessing at least 9 out of 13 correctly) -

Answer 1

Ans) let x be a Rondom Noriolble denote number oe buestions guesed corvectl p(x4) t P(x%)+ p(x=»-p(x-12).tpCx-13) 13 13113 lo 13 A1(3 2 log3) .00012203031 1093 仁0-1334.