mean of 20 observation is 17. if 20 is added to the sum of observation, then determine the sum remaining.
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Mean of 20 obsetvations=17
if 20 is added to it iy will be as same as the image or screenshot
if 20 is added to it iy will be as same as the image or screenshot
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mean of 20 objervations = 17
sum of 20 objervations = 17×20
= 340
according to question
20 is added to the sum of objervations
= 340+20
= 360
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