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, 28Solution
Sum of each term of given data = 10 × 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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