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

પુનરાવર્તન સહિત અંકો \(1, 2, 3, 4, 5\) ના ઉપયોગથી બનતી,\(6\) વડે વિભાજ્ય હોય તેવી \(3\)અંકો વાળી સંખ્યાઓની કુલ સંખ્યા \(.........\) છે.

  1. A \(15\)
  2. B \(16\)
  3. C \(14\)
  4. D \(13\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(16\)

Step-by-step Solution

Detailed explanation

For number to be divisible by '\(6\)' unit digit should be even and sum of digit is divisible by \(3.\) \((2,1,3),(2,3,4),(2,5,5),(2,2,5),(2,2,2)\) \((4,1,1),(4,4,1),(4,4,4),(4,3,5)\) \(2,1,3 \Rightarrow 312,132\) \(2,3,4 \Rightarrow 342,432,234,324\) \(2,5,5 \Rightarrow 552\)…
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