Mean and Variance of Data (Jee Mains) | ExamDuo
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Dispersion and Variance
Medium
Mean and Variance of Data
If the mean and the variance of the data
Class
4–8
8–12
12–16
16–20
Frequency
3
λ
4
7
are µ and 19 respectively, then the value of λ + µ is
SELECT ONE OPTION
A
18
B
21
C
20
D
19
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