what is the mean of first five even number?

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First five even numbers = 2, 4, 6, 8, 10

Mean = sum of obsevations/ number of observations

Sum of obsevations = 2 + 4 + 6 + 8 + 10

                                 = 30

Number of observations = 5

Therefore, Mean = sum of obsevations/ number of observations

                            = 30 / 5

                            = 6

Mean = 6