A) 12.5
B) 11.6
C) 13
D) 9.7
Correct Answer: A
Solution :
[a] Since, \[MD=\frac{4}{5}\sigma ,QD=\frac{2}{3}\sigma \] \[\Rightarrow \frac{MD}{QD}=\frac{6}{5}\Rightarrow QD=\frac{5}{6}(MD)=\frac{5}{6}.(15)=12.5\]
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