the mean of 5 numbers is 20 if one number is included mean of the remaining numbers becomes 23 find the included number
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Answer:
38
Step-by-step explanation:
Mean = sum of numbers / no of observation
20 = sum of observation / 5
Sum of observations = 100
New mean = 23
Now observations become 6 as one more number is added
23= sum/6
Sum = 138
New number = 138-100
New number = 38
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