Answer:
e. 11.11
Step-by-step explanation:
We use the negative binomial distribution to solve this question.
The mean of the negative binomial distribution is the average number of trials required to produce r sucesses, with p probability. Mathematically, this is described by the following formula:
In this problem, we have that:
Approximately 9 percent of the residents of a large city have seen a certain theater production that is currently playing in the city. This means that
What is the expected number of residents the researcher will need to ask to find someone who has seen the production?
This is when r = 1. So
So the correct answer is:
e. 11.11
Its c no dought in my mind
A=pR^2-2pr^2, since R=15 and r=7.5
A=225p-112.5p
A=112.5p
A≈353.25 ft^2
The unknown angles are in a ratio of 7 to 13.
Let 7x represent the smaller measure.Then, 13x represents the larger measure.
7x + 13x + 140 = 180
20x + 140 = 180
20x = 40
x = 2
7x = 7 * 2 = 14
13x = 13 * 2 = 26
The measures are 14 degree and 26 degrees.