शब्द (CHARACTER) की व्यवस्थाओं में दोनों (C) साथ हों लेकिन दोनों (A) साथ न हों, ऐसी कितनी भिन्न व्यवस्थाएं हैं?
In arrangements of (CHARACTER), how many distinct arrangements have the two (C)'s together but the two (A)'s not together?
Explanation opens after your attempt
D. (7560)
Concept
Treat the two (C)'s as a block, giving (8!/(2!2!)) arrangements, then subtract the cases with adjacent (A)'s, (7!/2!). For two conditions, first form the required block.
Why this answer is correct
The correct answer is D. (7560). Treat the two (C)'s as a block, giving (8!/(2!2!)) arrangements, then subtract the cases with adjacent (A)'s, (7!/2!). For two conditions, first form the required block.
Exam Tip
(C) को खंड मानकर कुल (8!/(2!2!)) व्यवस्थाएं हैं, फिर (A) साथ वाली (7!/2!) व्यवस्थाएं घटाएं। दो शर्तों में पहले अनिवार्य खंड बनाएं।
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