एक रेलवे यात्रा में शहर (A) से (B) तक (4) ट्रेनें और (B) से (C) तक (5) ट्रेनें हैं। यदि पूरी यात्रा (A) से (C) तक (B) होकर करनी है तो कुल तरीके कितने हैं?
In a railway journey there are (4) trains from city (A) to (B) and (5) trains from (B) to (C). If the whole journey from (A) to (C) must be through (B) how many ways are possible?
Explanation opens after your attempt
A. (20) तरीके(20) ways
Concept
There are (4) choices in the first stage and (5) in the second stage. The total is \(4 \times 5=20\) ways.
Why this answer is correct
The correct answer is A. (20) तरीके / (20) ways. There are (4) choices in the first stage and (5) in the second stage. The total is \(4 \times 5=20\) ways.
Exam Tip
पहले चरण में (4) और दूसरे चरण में (5) विकल्प हैं। कुल \(4 \times 5=20\) तरीके हैं।
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