Mathematics - Permutation & Combination Question with Solution | TestHub

MathematicsPermutation & CombinationGroup formationMedium2 minQB

MathematicsMediumsingle choice

In how many ways can 10 persons take seats in a row of 20 fixed seats so that each person has exactly one neighbour ?

Answer:

Solution:

$^{11} C_{5} \times \frac{10 !}{( 2 ! ) ^{5} \times 5 !} \times 5!$

Stream:JEESubject:MathematicsTopic:Permutation & CombinationSubtopic:Group formation

⏱ 2mℹ️ Source: QB

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