the mean of 15 no. is 8 if 2 is added to every no. what will be the new mean
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Mean = sum of all numbers/total number of numbers
8 = sum/15
sum of numbers = 8 × 15 = 120 .... (1)
Now
Mean = sum of numbers + 2 × 15/15
Mean = sum of all numbers + 30/15
Mean = 120 + 30/15 (from equation 1)
Mean = 150/15 = 10
Ans. New mean = 10 ^_^...
8 = sum/15
sum of numbers = 8 × 15 = 120 .... (1)
Now
Mean = sum of numbers + 2 × 15/15
Mean = sum of all numbers + 30/15
Mean = 120 + 30/15 (from equation 1)
Mean = 150/15 = 10
Ans. New mean = 10 ^_^...
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