Question
Find the value of 'a' in the given data if the mean of
the given data is 21. 15, 18, 20, 19, 22, 24, 17, a, 25, 16Solution
Sum of each term of given data = 10 × 21 = 210 So, 15 + 18 + 20 + 19 + 22 + 24 + 17 + a + 25 + 16 = 210 Or, 176 + a = 210 Or, 'a' = 34 Hence, option C.
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