The probability that an event does not happen in one trial is ` 0.8.` The probability that the even happens atmost once in three trials is

The probability that an event does not happen in one trial is 0.8 The probability that the event happens atmost once in three trials is

The probability that an event does not happen in one trial is 0.8 The probability that the event happens atmost once in three trials is

The probability than an event does not happen in one trail is 0.8. The probability that the event happens atmost once in three trails is

The probability of happeining an event A in one trial is 0.4. Find the probability that the event A happens at least once in three independent trials.

The probability of happening an event A in one trial is 0.4. Find the probability that the event A happens at least one in three independent trials.

The probability of happening an event A in one trial is 0.4. Find the probability that the event A happens at least one in three independent trials.

The probability of happening an event A in one trial is 0.4. Find the probability that the event A happens at least one in three independent trials.

The probability of happening an event A in one trial is 0.4. Find the probability that the event A happens at least one in three independent trials.

The probability of not happening of an event is 0.63 . The probability of happening of that events is

The probability of happening of an event in a trial is 0.5. The probability of happening of the event atlest once if the experiment is repeated 3 times is