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23-10-2020
Mathematics

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The average (arithmetic mean) of 9 consecutive integers is 16. What is the average of the four smallest of the integers? A. 9 B. 10.25 C. 11 D. 13.5

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monniesop31mul monniesop31mul

23-10-2020

Answer:

13.5

Step-by-step explanation:

16x 9 = 144

x + (x+1) + (x+2)+ (x+3)+ (x+4)+ (x+5)+ (x+6)+ (x+7)+ (x+8) = 144

9x + 36 = 144

9x = 108

x = 12

----------------------

(12 + 13 + 14 + 15)/4 = 13.5

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