Subject
Bank Exam
Topic
সমন্বিত ১০ ব্যাংক ও আর্থিক প্রতিষ্ঠান (সিনিয়র অফিসার) - ১০.১১.২০২৩
There are 3 doors to a lecture room. In how many ways can a lecturer enter the room from one door and leave from another door?
There are 3 doors to a lecture room. In how many ways can a lecturer enter the room from one door and leave from another door?
ক)
1খ)
3গ)
6ঘ)
9Explanation
As the lecturer can't leave the hall by the door he/she enters. So, number of ways can a student enter the hall through a door and leave the hall by a different door is = 3 × 2 = 6Related questions
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