Mathematics - Permutation & Combination Question with Solution | TestHub

MathematicsPermutation & CombinationFundamental PrincipleEasy2 minQB

MathematicsEasysingle choice

How many ways are there to form a three-letter sequence using the letters $a, b, c, d, e, f$ containing e when repetition of the letters is allowed

Answer:

Solution:

$6 \times 6 + 5 \times 6 + 5 \times 5 = 91$

Stream:JEESubject:MathematicsTopic:Permutation & CombinationSubtopic:Fundamental Principle

⏱ 2mℹ️ Source: QB

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