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Question
The mean of 6 observations 13, 18, 31, 7, 15 and k is 17. The value of k is ______.
Options
12
22
16
18
MCQ
Fill in the Blanks
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Solution
The mean of 6 observations 13, 18, 31, 7, 15 and k is 17. The value of k is 18.
Explanation:
Mean = `"Sum of observations"/6`
So, sum = 17 × 6 = 102.
Sum of given numbers = 13 + 18 + 31 + 7 + 15 = 84.
Therefore, k = 102 – 84 = 18.
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