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    Question

    Find the value of 'a' in the given data if the mean of

    the given data is 30. 25, 28, 32, 34, 27, 29, 31, a, 26, 28
    A 38 Correct Answer Incorrect Answer
    B 39 Correct Answer Incorrect Answer
    C 40 Correct Answer Incorrect Answer
    D 41 Correct Answer Incorrect Answer

    Solution

    Sum of each term of given data = 10 ├Ч 30 = 300 So, 25 + 28 + 32 + 34 + 27 + 29 + 31 + a + 26 + 28 = 300 Or, 260 + a = 300 Or, 'a' = 40 Hence, option C.

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