mean of 5 observation is 15 if mean of 1st three observation is 14 and last three observation is 14 and 17 respectively then find 3d observation
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mean of 5 observation =15
sum of 5 observation =5×15=75
sum of 1st 3 observation =14 ×3=42
sum of last observation =17×3=51
let 3rd observation = x
75 + x = 42 +51
x =93 -75
=18
sum of 5 observation =5×15=75
sum of 1st 3 observation =14 ×3=42
sum of last observation =17×3=51
let 3rd observation = x
75 + x = 42 +51
x =93 -75
=18
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