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JEE Mains · Maths · STD 11 - 14. probability

माना \(S =\{1,2,3,4,5,6\}\) है। तो \(S\) से \(S\) में एक यादच्छिक चुने गये आच्छादक फलन \(g\) के \(g (3)=2 g (1)\) को संतुष्ट करने की प्रायिकता है

  1. A \(\frac{1}{10}\)
  2. B \(\frac{1}{15}\)
  3. C \(\frac{1}{5}\)
  4. D \(\frac{1}{30}\)
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Answer & Solution

Correct Answer

(A) \(\frac{1}{10}\)

Step-by-step Solution

Detailed explanation

\(\mathrm{g}(3)=2 \mathrm{~g}(1)\) can be defined in \(3\) ways number of onto functions in this condition \(=3 \times 4 !\) Total number of onto functions \(=6 !\) Required probability \(=\frac{3 \times 4 !}{6 !}=\frac{1}{10}\)
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