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प्रश्न
The mean of a certain number of observations is 32. Find the resulting mean, if the observation is decreased by 20%.
उत्तर
Observation is decreased by 20%.
The new mean of observation = 32 - 20% of the 32
= 32 - `(20 xx 32)/100`
= 32 - 6.4
= 25.6
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