MHT CET · Maths · Permutation Combination
A round table conference is to be held amongst 20 countries. If two particular delegates wish to sit together, then such arrangements can be done in ways.
- A \(2 \times(18) !\)
- B \(\frac{19 !}{2 !}\)
- C \(18 !\)
- D \(19 ! \times 2 !\)
Answer & Solution
Correct Answer
(A) \(2 \times(18) !\)
Step-by-step Solution
Detailed explanation
We consider two particular delegates as single unit now 19 units can be arranged around a round table in 18! ways and the two delegates can be arranged mutually in 2 ! ways
Hence the required number of ways is \(2 \times(18\) !)
Hence the required number of ways is \(2 \times(18\) !)
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