ICSE Class 9 - Arithmetic Mean and Median Videos

• The mean of 12 boys is 10 years. It was found that the age of one boy was taken as 14 years in the place of 12 years .Find the correct mean.
• Find the mean of the following data 8,9,10,11,9,8,11,10,12,11,12,9,8,11
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