Answer:
11.44% probability that exactly 12 members of the sample received a pneumococcal vaccination.
Step-by-step explanation:
For each adult, there are only two possible outcomes. Either they received a pneumococcal vaccination, or they did not. The probability of an adult receiving a pneumococcal vaccination is independent of other adults. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

In which
is the number of different combinations of x objects from a set of n elements, given by the following formula.

And p is the probability of X happening.
70% of U.S. adults aged 65 and over have ever received a pneumococcal vaccination.
This means that 
20 adults
This means that 
Determine the probability that exactly 12 members of the sample received a pneumococcal vaccination.
This is P(X = 12).


11.44% probability that exactly 12 members of the sample received a pneumococcal vaccination.
Answer:
yes
Step-by-step explanation:
5x+3(x-5)=6x+2x-15
5x+3x-15=6x+2x-15
8x-15=8x-15
No solution
Answer:
<h2>-4/3</h2>
Step-by-step explanation:
<h3>Step 1: Divide</h3>

<h3>Step 2: Answer</h3>
x = -4/3
<h3>Step 3: Check</h3>
10/3 = -4/3 / -5/2
3.3 = 3.3✔️
<h3>Step 4: Verified Answer</h3>
x = -4/3
I'm always happy to help :)
Answer:
i think its b
Step-by-step explanation: