If the mean of 25 observations is 27 and each observation is decreased by 7,what will be the new mean?
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answer: 20 new mean
Step-by-step explanation:
Mean of given observations = sum of given observations/ total number of observationsMean of 25 observations = 27∴ Sum of 25 observations = 27 × 25 = 675If 7 is subtracted from every number then the sum = 675 – 25 × 7 = 675 – 175 = 500Then new mean = 500/25 = 20Thus the new mean will be 20.
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