(5) अलग-अलग गणित की और (3) अलग-अलग विज्ञान की पुस्तकों को ऐसे कितने तरीकों से रखा जा सकता है कि विषयवार पुस्तकें साथ रहें?
In how many ways can (5) distinct mathematics books and (3) distinct science books be arranged so that books of each subject remain together?
Explanation opens after your attempt
A. (1440)
Concept
Treat the two subjects as two blocks, so \(2!\cdot5!\cdot3!=1440\). In exams, arrange inside each block separately.
Why this answer is correct
The correct answer is A. (1440). Treat the two subjects as two blocks, so \(2!\cdot5!\cdot3!=1440\). In exams, arrange inside each block separately.
Exam Tip
दो विषयों को दो ब्लॉक मानें, इसलिए \(2!\cdot5!\cdot3!=1440\)। परीक्षा में हर ब्लॉक की अंदरूनी व्यवस्था अलग से करें।
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