11) In how many way the letter of the word 'RUMOUR' can be arran
12) How many words can be formed from the letters of the word 'SIGNATURE' so that vowels always come togeth
13) In how many ways can the letters of the word 'CORPORATION' be arranged so that vowels always come togeth
14) In a group of 6 boys and 4 girls, four children are to be selected. In how many different ways can they be selected such that at least one boy should be th
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