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In arrangements of (SEQUENCE), how many distinct arrangements have exactly (4) letters between (S) and (Q)?शब्द (SEQUENCE) की व्यवस्थाओं में (S) और (Q) के बीच ठीक (4) अक्षर हों, ऐसी कितनी भिन्न व्यवस्थाएं हैं?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (720)(720)
There are (3) position pairs at distance (5) for (S,Q), with (2) orders, and the remaining (6) places fill in (6!/3!) ways. For gap-distance questions, count position pairs first.(S,Q) के लिए दूरी (5) वाले (3) स्थान-जोड़े और (2) क्रम हैं, शेष (6) स्थान (6!/3!) तरीकों से भरते हैं। दूरी वाले प्रश्न में स्थान-जोड़े पहले गिनें।
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