A) 27
B) 28
C) 40
D) 41
Correct Answer: B
Solution :
As per the given conditions, there are two possible arrangements as shown below \[\begin{align} & \overset{21}{\longleftrightarrow}A\overset{5}{\longleftrightarrow}B\overset{8}{\longleftrightarrow}C\overset{3}{\longleftrightarrow}\overset{21}{\longleftrightarrow} \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,I \\ \end{align}\] \[\begin{align} & \overset{3}{\longleftrightarrow}C\overset{2}{\longleftrightarrow}A\overset{5}{\longleftrightarrow}B\overset{8}{\longleftrightarrow} \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,II \\ \end{align}\] Clearly, for the minimum number of persons, we shall consider arrangement II. In II, number of persons in the queue \[=(3+1+2+1+21)=28.\]You need to login to perform this action.
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