\(A=\{1,2,3,4\}\) और \(B=\{a,b,c\}\) हैं। ऐसे कितने फलन हैं जिनमें (f(1)=f(2)=f(3)) हो?
Let \(A=\{1,2,3,4\}\) and \(B=\{a,b,c\}\). How many functions satisfy (f(1)=f(2)=f(3))?
Explanation opens after your attempt
B. (9)
Concept
There are (3) choices for the common image of the first three elements and (3) choices for the image of (4). Total functions are \(3\cdot3=9\).
Why this answer is correct
The correct answer is B. (9). There are (3) choices for the common image of the first three elements and (3) choices for the image of (4). Total functions are \(3\cdot3=9\).
Exam Tip
पहले तीन अवयवों की समान छवि के लिए (3) विकल्प हैं और (4) की छवि के लिए (3) विकल्प हैं। कुल \(3\cdot3=9\) फलन हैं।
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