(8) books को shelf पर रखना है और (3) specific books का relative order fixed हो। Count क्या होगा?
(8) books are arranged on a shelf and the relative order of (3) specific books is fixed. What is the count?
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Correct Answer
A. \(\frac{8!}{3!}\)
Concept
Only (1) of the (3!) possible relative orders of those (3) books is allowed. In exams divide total by (k!) for fixed relative order.
Why this answer is correct
The correct answer is A. \(\frac{8!}{3!}\). Only (1) of the (3!) possible relative orders of those (3) books is allowed. In exams divide total by (k!) for fixed relative order.
Exam Tip
उन (3) books की (3!) possible relative orders में केवल (1) allowed है। परीक्षा में fixed relative order में total को (k!) से divide करें।
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