(5) अलग-अलग चाबियों को (5) अलग-अलग ताले में आजमाने के क्रम कितने हैं यदि हर चाबी ठीक एक बार आजमाई जाए?
How many orders are possible for trying (5) distinct keys in (5) distinct locks if each key is tried exactly once?
Explanation opens after your attempt
C. (120)
Concept
The orders of (5) distinct objects are (5!). When only order is asked, apply factorial directly.
Why this answer is correct
The correct answer is C. (120). The orders of (5) distinct objects are (5!). When only order is asked, apply factorial directly.
Exam Tip
(5) अलग वस्तुओं के क्रम (5!) होते हैं। केवल क्रम पूछा हो तो सीधा फैक्टोरियल लगाएं।
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