Question

if the mean of 5 observation x, x + 2, X + 4 x + 6 X + 8, is 11 find the mean of first 3observation

Answer 1

Answer:

5x+20/5=11 5x+20=55 5x=35 x=7 first three observations are x,x+2,x+4=7,9,11 7+9+11/3 =27/3=9. Therefore the mean of first three numbers is 9.

Explanation:

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