If the average of x, y, and 30 is 10, then the average of x and y is

Question

(A) 0

(B) 5

(C) 15/2

(D) 10

(E) 30

varun4s · Answer

\frac{x+y+30}{3} = 10

x+y+30= 30

So, x+y=0

Average of x and y=  \frac{x+y}{2} =  \frac{0}{2} = 0

Answer: A.

KSBGC · Answer

(x+y+30)/3=10
x+y+30=30
(x+y)/2=0/2
0

Mo2men · Answer

Apply average formula:

\frac{x+y+30}{3} = 10

x+y+30= 30

x+y=0.........No need to bother calculate as it is always ZERO

Answer: A

rishabhmishra · Answer

IMO A  x+y+30= 10*3= 30
then X+Y=0 and their average is X+Y/2=0/2 =0

Hatakekakashi · Answer

x+y+30/3 = 10

x+y+30 = 30

x+y = 0

avg = 0

(A) imo

JeffTargetTestPrep · Answer

Since the average of x, y, and 30 is 10, we have:

(x + y + 30)/3 = 10

x + y + 30 = 30

x + y = 0

So the average of x and y is (x + y)/2 = 0/2 = 0.

Answer: A

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