(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
Correct Answer

B. (6)

Step 1

Concept

The particular poster is already selected. The second poster is chosen from the remaining (6) in \(\binom{6}{1}=6\) ways.

Step 2

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.

Step 3

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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Mathematics Answer, Explanation and Revision Hints

(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?

Correct Answer: B. (6). Explanation: खास पोस्टर पहले से चुना है। दूसरा पोस्टर शेष (6) में से \(\binom{6}{1}=6\) तरीकों से चुनेगा। / The particular poster is already selected. The second poster is chosen from the remaining (6) in \(\binom{6}{1}=6\) ways.

Which concept should I revise for this Mathematics MCQ?

The particular poster is already selected. The second poster is chosen from the remaining (6) in \(\binom{6}{1}=6\) ways.

What exam hint can help solve this Mathematics question?

खास पोस्टर पहले से चुना है। दूसरा पोस्टर शेष (6) में से \(\binom{6}{1}=6\) तरीकों से चुनेगा।