Question
Find the value of 'a' in the given data if the mean of
the given data is 20. 10, 15, 18, 22, 24, 19, 21, a, 16, 25Solution
Sum of each term of given data = 10 × 20 = 200 So, 10 + 15 + 18 + 22 + 24 + 19 + 21 + a + 16 + 25 = 200 Or, 170 + a = 200 Or, 'a' = 30 Hence, option A.
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