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Question

Arithmetic mean of 5 numbers in a series is 16. If 2 numbers (mean numbers) are removed from this series and replaced with 20 and 24, what will be the new mean?


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Solution

Arithmetic Mean of the 5 numbers = 16

Sum of the numbers = 16 × 5 = 80

Removing 2 numbers we get : 80 - 32 = 48

Adding 20 and 24 to 48, we get: 48 + 44 = 92

New mean of these 5 numbers will be: 925 = 18.4


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