Q9 of 140 Page 307

How many words can be formed from the letters of the word ‘SERIES’, which start with S and end with S?

To find: number of words which start and end with S

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There are 4 places to fill up with 4 letters out of which 2 are of the same kind

Number of words =

12 words are possible

How many words can be formed by arranging the letters of the word ‘INDIA’, so that the vowels are never together?

Find the number of arrangements of the letters of the word ‘ALGEBRA’ without altering the relative positions of the vowels and the consonants.

In how many ways can the letters of the word ‘PARALLEL’ be arranged so that all L’s do not come together?

How many different words can be formed with the letters of the word ‘CAPTAIN’? In how many of these C and T are never together?