Question

the probability of happening an event A in one trial is 0.4.the probability that the event A happens atleast once in three independent trials is​

Answer 1

Answer:

0.784

Step-by-step explanation:

the probability that an event happens in one trial of an experiment is 0.4 . three independent trials of the experiment are performed. find the probability that the event happens at least once???

probability that an event happens in one trial of an experiment = 0.4

Probability of that event not happening in one trial = 1 - 0.4 = 0.6

probability that the event happens at least once in three trails

= 1 - Probability of that event not happening in all three trials

= 1 - (0.6)(0.6)(0.6)

= 1 - 0.216

= 0.784

probability that the event happens at least once = 0.784