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x+x+2+x+4+x+6+x+8=5x+20=11*5==>x='55-20)/5=7 ==> x+x+2+x+4=3x+6=3*7+6=27 : means= 27/3=9
yes
my answer is correct
Read x=(55-20)/7 and mean=27/3=9 sorry for the mistakes
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9 is the answer
because mean is equal to sum of observation by total number of observations
here x = 7
then mean of 3 observation = 27/3
9
because mean is equal to sum of observation by total number of observations
here x = 7
then mean of 3 observation = 27/3
9
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