(4) अलग-अलग दिशासूचक कार्डों को ऊपर से नीचे रखने के तरीके कितने हैं?
In how many ways can (4) different direction cards be placed from top to bottom?
Explanation opens after your attempt
A. (24)
Concept
The top-to-bottom arrangement of (4) distinct cards is (4!=24). Use factorial in linear order.
Why this answer is correct
The correct answer is A. (24). The top-to-bottom arrangement of (4) distinct cards is (4!=24). Use factorial in linear order.
Exam Tip
ऊपर से नीचे (4) अलग कार्डों की व्यवस्था (4!=24) है। linear order में factorial प्रयोग करें।
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