CBSE Class 8 Mathematics
Question 2 of 15
Tales by Dots and Lines — Question 2
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Question The dot plot below shows a collection of data and its average, but one dot is missing. Mark the missing value so that the mean is 9 (as shown below).
From the dot plot, the data values 4, 7, 8, 8, 9, 9, 9, 9, 9, 11, x Number of observations = 11 Mean = 9 Sum of data values = 4 + 7 + 8 + 8 + 9 + 9 + 9 + 9 + 9 + 11 = 83 Total sum = 9 × 11 = 99 Missing number = 99 – 83 = 16