SSC CHSL Model Paper 6

Question : 67 of 100

Marks: +1, -0

. 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?

40
400
5040
2520

Validate

Solution:

'LOGARITHMS' contains 10 different letters.
Required number of words = Number of arrangements of 10 letters, taking 4 at a time.
=

^10P_4

= (10 × 9 × 8 × 7)
= 5040.

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