SOLUTION: Find the value of y if the mean of x ,y,15, and 35 is 25 and the mean of x,15, and 35 is 27 A 18 B 19 C 31 D 36

Algebra ->  Average -> SOLUTION: Find the value of y if the mean of x ,y,15, and 35 is 25 and the mean of x,15, and 35 is 27 A 18 B 19 C 31 D 36       Log On


   

Question 347100: Find the value of y if the mean of x ,y,15, and 35 is 25 and the mean of x,15, and 35 is 27
A 18 B 19 C 31 D 36

Found 2 solutions by Fombitz, stanbon:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
%28x%2By%2B15%2B35%29%2F4=25
x%2By%2B50=100
x%2By=50
.
.
.
%28x%2B15%2B35%29%2F3=27
x%2B50=81
x=31
.
.
.
Substituting,
31%2By=50
highlight%28y=19%29

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Find the value of y if the mean of x ,y,15, and 35 is 25
and the mean of x,15, and 35 is 27
-----
(x+y+15+35)/4=25
(x+15+35)/3 = 27
-----------------------
Solve the 2nd for "x":
(x+50) = 81
x = 31
-----------------
Now solve the 1st for "y":
(31+y+15+35) = 100
y+81 = 100
y = 19
============
Cheers,
Stan H.


A 18 B 19 C 31 D 36