Question
Find the value of 'a' in the given data if the mean of
the given data is 18. 12, 15, 20, 17, 19, 14, 21, a, 13, 16Solution
Sum of each term of given data = 10 Ă— 18 = 180 So, 12 + 15 + 20 + 17 + 19 + 14 + 21 + a + 13 + 16 = 180 Or, 147 + a = 180 Or, 'a' = 33 Hence, option C.
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