(7) अलग-अलग पोस्टरों में से (2) पोस्टर चुनने हैं लेकिन एक खास पोस्टर अवश्य चुना जाए। कितने तरीके हैं?
From (7) different posters, (2) posters are to be selected, but one particular poster must be chosen. How many ways are there?
Explanation opens after your attempt
B. (6)
Concept
The particular poster is already selected. The second poster is chosen from the remaining (6) in \(\binom{6}{1}=6\) ways.
Why this answer is correct
The correct answer is B. (6). The particular poster is already selected. The second poster is chosen from the remaining (6) in \(\binom{6}{1}=6\) ways.
Exam Tip
खास पोस्टर पहले से चुना है। दूसरा पोस्टर शेष (6) में से \(\binom{6}{1}=6\) तरीकों से चुनेगा।
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