the mean of 10 observations is 50 if a new number is added the new mean becomes 60 find the new number
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Mean of 10 observations=50
Sum of 10observations=10*50=500
Mean of 11 observations=60
Sum of 11 observations=11*60=660
So,the new number is 660-500=160
Hope it helps.
Sum of 10observations=10*50=500
Mean of 11 observations=60
Sum of 11 observations=11*60=660
So,the new number is 660-500=160
Hope it helps.
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