How many different words can be made using the letters of ...

(a ) 671 (b ) 168 (c ) 176 (d ) none of these 13. The number of signals that can be generated by using 5 differently coloured flags, when any number of them may be hoisted at a time is: (a ) 235 (b ) 253 (c ) 325 (d ) none of these 14. If the letters of the word VERMA are arranged in all possible ways and these words are ................
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