mean of data is 9 if each observation is multiplied by 3 and 1 is added to each find new meanhttp://brainly.in/question/add?entry=1642&task_content=mean%20of%20data%20is%209%20if%20each%20observation%20is%20multiplied%20by%203%20and%201%20is%20added%20to%20each%20find%20new%20mean
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Let the observations be x1 , x2, x3,........................xn
mean = (x1+x2+x3+........................+xn)/n = 9
if each term is multiplied by 3 and 1 is added to it, the terms are
3x1+1, 3x2+1, 3x3+1,.....................,3xn+1
mean = (3x1+1+ 3x2+1+ 3x3+1+.....................+3xn+1)/n
= {3(x1+x2+x3+........................+xn) + n}/n
= 3×9 +1 = 27+1 = 28
mean = (x1+x2+x3+........................+xn)/n = 9
if each term is multiplied by 3 and 1 is added to it, the terms are
3x1+1, 3x2+1, 3x3+1,.....................,3xn+1
mean = (3x1+1+ 3x2+1+ 3x3+1+.....................+3xn+1)/n
= {3(x1+x2+x3+........................+xn) + n}/n
= 3×9 +1 = 27+1 = 28
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