Mean and variance of data set (Jee Mains) | ExamDuo
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Dispersion and Variance
Medium
Mean and variance of data set
If the mean and the variance of 6, 4, a, 8, b, 12, 10, 13 are 9 and 9.25 respectively, then a + b + ab is equal to :
SELECT ONE OPTION
A
105
B
103
C
100
D
106
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