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    The mean of the first ten even natural numbers is:
    Question

    The mean of the first ten even natural numbers is:

    A.

    10

    B.

    8

    C.

    11

    D.

    9

    Correct option is C

    Given:

    We need to find the mean of the first ten even natural numbers.

    Formula Used:

    Mean =(Sum of all observations)  (Number of observations) \frac{\text{(Sum of all observations) }}{\text{ (Number of observations)}}

    Solution:

    Sum = 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 = 110

    Mean = 11010=11\frac{110}{10} = 11​​

    Alternate Method:

    First term = 2

    Last term = 20

    Mean = (First term + Last term) 2\frac{\text{(First term + Last term) }} 2​​

    Mean =(2+20)2=222=\frac{ (2 + 20) }{ 2} =\frac{ 22 } 2 ​= 11

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