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JEE Mains · Maths · STD 11 - 6. permutation and combination

\(0\) से \(9\) तक के अंकों के प्रयोग से, अंकों को दोहराए बिना, एक \(9\) से भाज्य, आठ अंकों की संख्या बनानी है। यह जितने तरीकों से किया जा सकता है, वे हैं 

  1. A \(72 (7!)\)
  2. B \(18 (7!)\)
  3. C \(40(7!)\)
  4. D \(36(7!)\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(36(7!)\)

Step-by-step Solution

Detailed explanation

We know that any number is divisible by \(9\) if sum of the digits of the number is divisible by \(9\). Now sum of the digits from \(0\) to \(9\) \(=0+1+2+3+4+5+6+7+8+9\) \(=45\) Hence to from \(8\) digits numbers which are divisible by \(9\), a pair of digits either \(0\) and…
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