Q.
If the ratio of mode and median of a distribution is 6 : 5, then the ratio of its mean and median is
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a
8:9
b
9:10
c
9:7
d
8:11
answer is B.
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Detailed Solution
We have Mode: Median =6:5⇒ Mode =6λ, Median =5λNow, Mode =3 Median −2 Mean ⇒ 6λ=3×5λ−2 Mean ⇒ Mean =92λ∴ Mean : Median =9λ2:5λ=9:10
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