(5) अलग-अलग लिफाफों पर (5) अलग-अलग टिकट चिपकाने के तरीके कितने हैं?
In how many ways can (5) different stamps be pasted on (5) different envelopes?
Explanation opens after your attempt
A. (120)
Concept
(5) different stamps can be pasted on (5) different envelopes in (5!=120) ways. Factorial is useful in one-to-one matching.
Why this answer is correct
The correct answer is A. (120). (5) different stamps can be pasted on (5) different envelopes in (5!=120) ways. Factorial is useful in one-to-one matching.
Exam Tip
(5) अलग टिकट (5) अलग लिफाफों पर (5!=120) तरीकों से लगेंगे। one-to-one matching में factorial उपयोगी है।
Login to save your score, XP, coins and progress.
