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To go from (A) to (B) on a grid, (3) right moves and (2) up moves are needed. If the first two moves cannot both be right, how many paths are possible?एक ग्रिड में (A) से (B) तक जाने के लिए (3) दाएँ और (2) ऊपर कदम चाहिए। यदि पहले दो कदम दोनों दाएँ नहीं हो सकते, तो कुल रास्ते कितने हैं?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (7)(7)
Total paths are (10). If the first two are right, the remaining (1) right and (2) up moves can be arranged in (3) ways.कुल रास्ते (10) हैं। पहले दो दाएँ होने पर बाकी (1) दाएँ और (2) ऊपर को (3) तरीकों से रखा जाता है।
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