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How many ways can the letters of GANIT be arranged?

Answer and explanation

Correct answer: 120

The relevant principle is the factorial rule for arranging distinct objects. GANIT has five letters: G, A, N, I and T, and none of them is repeated. Therefore the first position can be filled in 5 ways, the second in 4, then 3, 2 and 1 ways. The total is 5 × 4 × 3 × 2 × 1 = 5! = 120. Hence option A is correct. Option B, 60, and option D, 240, do not equal the required factorial count. Option C, 24 = 4!, would count arrangements of only four distinct letters, not all five letters. Every letter is used exactly once, so no division for repetition is needed.

Related tags

PermutationsWord ArrangementDistinct LettersPermutations And CombinationsMathematicsClass 11 Mcq

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