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Question

Q. In how many ways can 4 women fill water into 4 different bottles if no bottle can be filled more than once?

Q. 4 महिलाएं कितने तरीकों से 4 अलग-अलग बोतलों में पानी भर सकती हैं यदि कोई बोतल एक से अधिक बार नहीं भरी जा सकती है?

A

4
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B

16
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C

24
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D

64
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Solution

The correct option is C
24
1st woman can fill water into any of the 4 bottles.
2nd woman can fill water into any of the remaining 3 bottles.
Similarly, 2 and 1 bottle for the 3rd and 4th woman respectively.
Thus, the total number of ways =4×3×2×1=24 ways

पहली महिला किसी भी 4 बोतलों में पानी भर सकती है।
दूसरी महिला शेष 3 बोतलों में से किसी में पानी भर सकती है।
इसी तरह, तीसरी और चौथी महिला के लिए क्रमशः 2 और 1 बोतल है ।
इस प्रकार, तरीकों की कुल संख्या =4×3×2×1=24 तरीके

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