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A student was asked to find the arithmet...

A student was asked to find the arithmetic mean of the following 12 numbers :
3,11, 7,9, 15, 13, 8,19, 17, 21, 14 and x.
He found the mean to be 12. The value of x will be :

A

3

B

7

C

17

D

31

Text Solution

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The correct Answer is:
B
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ARIHANT PUBLICATION PUNJAB-PROBLEMS BASED ON ARITHMETIC - CHAPTER EXERCISE
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