જે કુટુંબમાં ત્રણ સભ્યો હોય તેવા બે કુંટુંબો અને ચાર સભ્યો ધરાવતું એક કુંટુંબને એક હારમાં બેસાડવામાં આવે છે તો આ બધા સભ્યોને કેટલી રીતે બેસાડી શકાય કે જેથી એક જ કુટુંબના સભ્યો હંમેશા સાથે જ આવે ?

A \(2 ! 3 ! 4 !\)
B \((3 !)^{3} \cdot(4 !)\)
C \((3 !)^{2} \cdot(4 !)\)
D \(3 !(4 !)^{3}\)

Verified Solution

Answer & Solution

Correct Answer

(B) \((3 !)^{3} \cdot(4 !)\)

Step-by-step Solution

Detailed explanation

Total numbers in three familes \(=3+3+4=10\) so total arrangement \(=10 !\) \( \begin{array}{|c|c||c|}\hline \text { Family 1 } & \text { Family 2 } & \text { Family 3 } \\3 & 3 & 4 \\\hline\end{array}\) Favourable cases…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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