Answer:
looks like D...............
Answer:
New mean=71.32
Step-by-step explanation:
The expression for the total initial score is;
T=M×S
where;
T=total initial score
M=mean score
S=number in the set
replacing;
T=unknown
M=72
S=17
replacing;
T=72×17=1,224
The total initial score=1,224
Determine the total score by;
total score=total initial score+total final score
where;
total initial score=1,224
total final score=(68+63)=131
replacing;
total score=1,224+131=1,355
Determine the new mean;
New mean=total score/new number
where;
total score=1,355
new number=(17+2)=19
replacing;
new mean=1,355/19=71.32
Hey there!
Assuming you meant
If so, follow these steps so it can be a little bit easier to solve
Firstly, we have to 
by 
on each of your sides
We get: 
Now, we have 
by 
on each of your sides
We get: 
± 
Therefore , your answer is: ±
Good luck on your assignment and enjoy your day!
~
Just took the test, the answer is C.
:)
Answer:
I can't explain here since I can't write numbers.
Step-by-step explanation:
