Population: All high school students.   We're interested in the health of <em>all</em> of them, that's our population.
Sample: Athletes who were surveyed.  Our sample is where we got our actual data.
 
        
                    
             
        
        
        
Answer:
 = 5n - 1
 = 5n - 1
Step-by-step explanation:
There is a common difference between consecutive terms , that is
9 - 4 = 14 - 9 = 19 - 14 = 5
This indicates the sequence is arithmetic with nth term
 = a₁ + (n - 1)d
 = a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Here a₁ = 4 and d = 5 , then
 = 4 + 5(n - 1) = 4 + 5n - 5 = 5n - 1
 = 4 + 5(n - 1) = 4 + 5n - 5 = 5n - 1
 
        
                    
             
        
        
        
Answer:
A. 336
B. Arranging 3 people in 8 chairs.
C. 42
B. Arranging 2 people in 7 chairs.
Step-by-step explanation:
A.

Formula for Permutation is given as:

Putting the value of  = 8 and
 = 8 and  , we get:
 , we get:

B. Real world situation for part A:
Arranging 3 people on 8 chairs.
First person has 8 options.
Second person has 7 options.
Third person has 6 options.
C. 

Formula for Permutation is given as:

Putting the value of  = 7 and
 = 7 and  = 2 , we get:
 = 2 , we get:

D.  Real world situation for part AC:
Arranging 2 people on 7 chairs.
First person has 7 options.
Second person has 6 options.