2 votes 2 votes How many different words can be formed using all the letters of the word ALLAHABAD? (a) When vowels occupy the even positions. (b) Both L do not occur together. sumit goyal 1 asked Aug 20, 2017 sumit goyal 1 845 views answer comment Share Follow See all 11 Comments See all 11 11 Comments reply Show 8 previous comments stblue commented Aug 21, 2017 reply Follow Share Yes yes true, when we talk about arrangement we count the word, and when we talk about rearrangement we exclude the given word. I will post another example from arun sharma, which will clear this concept. 0 votes 0 votes abhishek tiwary commented Aug 30, 2017 reply Follow Share in case of "re -arrangement" we have to subtract 1 not arrangement 0 votes 0 votes Shubhanshu commented Aug 30, 2017 reply Follow Share Subtracting 1 means we are excluding that one given arrangement from the total no of arrangements. 0 votes 0 votes Please log in or register to add a comment.
Best answer 1 votes 1 votes Here is an example from Arun sharma, Have a look stblue answered Aug 21, 2017 selected Aug 21, 2017 by sumit goyal 1 stblue comment Share Follow See all 3 Comments See all 3 3 Comments reply sumit goyal 1 commented Aug 21, 2017 reply Follow Share thnks bro 0 votes 0 votes rahul sharma 5 commented Aug 21, 2017 reply Follow Share Are you sure we subtract -1 ? I have not seen any such question except the example you posted 0 votes 0 votes sumit goyal 1 commented Aug 21, 2017 reply Follow Share wo clear hgya , we dont have to subtract 0 votes 0 votes Please log in or register to add a comment.