the mean of 10 numbers is 20.if 5 is subtracted from every number.what will be the new mean?
Let the sum of ten numbers be 'x'
According to question
Mean=Sum of numbers/Number of numbers
Now, Modified sum can be found as follows,
From every number 5 is subtracted,
=> Modified Sum=200-50=150
Now, The Modified mean can be counted as follows,
Mean=Modified Sum/Total number of observations
So required Answer----> The modified mean is 15.
20 = y/10 ( y is the collective variable for the ten numbers)
y = 200
The ten numbers add up to 200
Now we will subtract 5 from every numbers which means there are 10 numbers then it will be 10 * (-5) = ( -50)
So 200 - 50 = 150
Now the new mean is 150 / 10 = 15
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