assume that when adults with smartphones are randomly selected, 53% use them in meetings or classes. if 30 adult smartphone users are randomly selected, find the
probability that exactly 23 of them use their smartphones in meetings or classes.
the probability is
(round to four decimal places as needed.)

P(23 ,30 , 0.53 ) = 0.0047

Step-by-step explanation:

Binomial Distribution

The Binomial Distribution is used to find the probability of an situation where n independent events each with a probability of success equal to p are computed k successes.

The Probability Mass Function is

Where

We know 53% of adults with smartphones use them in meetings or classes. This is the probability of success of a single event, or p=0.53. Since q=1-p, q=0.47. We'll compute the probability that exactly 23 out of 30 adults use their smartphones in meetings or classes. Thus n=30, k=23

The required probability is

P(23,30,0.53)=0.0047

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3

idk lol xd

step-by-step explanation:

ez do it yourself lazy