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### Question Asked by a Student from EXXAMM.com Team

** Q 3032791632. ** A student was asked to find the average of the following `12` numbers :`3, 11, 7, 9 , 15, 13, 8, 19, 17, 21, 14` and ` x`. He found the average to be $ $ $ 1 2 $ $ . What should come in place of `x`?