Question

The probability that an event a happens is one trial of an experiment is 0.4

Answer 1

Answer:

    The probability that happens in one trail  = 0.4

                                                              P ( E' ) = 1 - P ( E )

                                                               P ( E' ) = 1 - 0.4

                                                                P ( E' ) = 0.96 or 0.6

    I hope it will help you.  Mark me as a brainlist