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?
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?
Explanation opens after your attempt
B. (7)
Concept
Total paths are (10). If the first two are right, the remaining (1) right and (2) up moves can be arranged in (3) ways.
Why this answer is correct
The correct answer is B. (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.
Exam Tip
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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