Question

what will be the mean of x x 2 x+2 x+4 x+6 x+8 where the value of x is 12

Answer 1

Step-by-step explanation:

Solution



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Correct option is D)

Mean of the given observations = 11

The observations are : x,x+2,x+4,x+6,x+8

Mean = Number of observationsSum = 5x+x+2+x+4+x+6+x+8

Mean = 55x+20 = x+4

⇒x+4=11

⇒x=7

The first three observations are: 7,9,11

Mean of three observations = 37+9+11 = 9