Mathematics - Permutation & Combination Question with Solution | TestHub

MathematicsPermutation & CombinationnPr & nCrEasy2 minQB

MathematicsEasysingle choice

From a group of persons the number of ways of selecting 5 persons is equal to that of 8 persons. The number of persons in the group is

Answer:

Solution:

use $^{n} C_{r} =^{n} C_{s} \Leftrightarrow n = r + sor r = s$

Stream:JEESubject:MathematicsTopic:Permutation & CombinationSubtopic:nPr & nCr

⏱ 2mℹ️ Source: QB

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