Question

For what value of x, the mean of given observations 2x-2, x+3, 7-x5-x and x+9 with frequencies 2, 3, 4, 6 and 1 respectively is 4

Answer 1

Answer:

23 is correct answer..........

I hope help you......

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Answer 2

Answer:

see fixi= 4x-4 + 3x+9+28-20x -6x+x+9

-18x+42

fi=16

mean = fixi/fi

4=-18x+42/16

64-42= -18x

22/-18=x

×=11/-9