Step-by-step Answer
PAGE: 47SET: ExercisesPROBLEM: 61
Please look in your text book for this problem Statement

Mean of a set is the sum of the values divided by the number of values in the set.

Mean of two real numbers is,, where a, b are real numbers.

                   (Substitute )

                          (Add: )

                             (Divide: )

Mean of 9,15 is .



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