Find the probability of no more than 2 successes in a trial of 5 in which the probability of success in any one trial is 18%

0.956

Step-by-step explanation:

X is the random variable representing the number of successes in the experiment in question;

X is represented by a binomial distribution with 5 trials and 0.18 probability of success, X~B (5, 0.18);

The probability of r successes, P(X=r), is found using the formula shown in second pic;

Working is shown in the other pic.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have