Question

If the arithmetic mean of 5,8,10,9,x,11,12 is 9. Find the value of x​

Answer 1

Answer:

5+8+10+9+x+11+12/7 = 9  

55+x/7 = 9  

55+x = 9 x 7  

55+x = 63  

x = 63 - 55  

x = 8  

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Answer 2

Answer:

Heya!!

Step-by-step explanation:

Refer the attachment!!

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