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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

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