Question

If the mean of 2,4,6,8,x,y is 5 then find the value of x+y.

Answer 1

X= 5 
THEN: ∑fixi/∑xi =5
so 2+4+6+8+x+y /6=5
20+x+y =30 (5*6)
x+y= 30-20 =10
ans:x+y=10

Answer 2

Mean =5
⇒[tex] \frac{(2+4+6+8+x+y)}{6} =5. [/tex]
⇒20+x+y=30
⇒x+y=10