the mean of 6number is20 if one number is deleted their mean is 15 find deleted number
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Answer:
Step-by-step explanation:
Mean = Sum of observations/ no of observations
20 = sum of observations /6
Sum = 20 × 6
Sum = 120
On deleting one number the mean is 15
Hence the new sum is given as
New sum = 15 × 5 = 75
Hence the number deleted = 120 - 75
= 45
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