Find the probability of no failures in five trials of a binomial experiment in which the probability of success is 30%. (round to the nearest tenth of a percent)

If the probability of success is 30%, then p=0.3 and q=1-p=1-0.3=0.7.

The probability of no failures in five trials in binomial experiment is

.

In percent this is 0.00243·100%=0.243%=0.2% (rounded to the nearest tenth of a percent).

The probability of no failures in five trials is 0.2%.

if x = 1, then the answer is 3.5