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Arithmetic aptitude :: Permutations and Combinations :: General Questions




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21.

In how many different ways can the letters of the word 'RUMOUR' be arranged ?


A) 180

B) 90

C) 30

D) 720

E) None of these



22.

In how many ways can the letters of the word 'LEADER' be arranged ?


A) 72

B) 144

C) 360

D) 720

E) None of these



23.

In how many ways can the letters of the word 'APPLE' be arranged ?


A) 720

B) 120

C) 60

D) 180

E) None of these



24.

How many words with or without meaning, can be formed by using all the letters of the word, 'DELHI', using each letter exactly once ?


A) 10

B) 25

C) 60

D) 120



25.

How many 4-letter words with or without meaning, can be formed out of the letters of the word, 'LOGARITHMS', if repetition of letters is not allowed ?


A) 40

B) 400

C) 5040

D) 2520



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