10 people are arranged around a table. A chairperson and secretary are to be elected. How many arrangements are possible such s that the chairperson and secretary are opposite each other
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answer says 7! x 8
ohh ok i get it now remove the 2 people (chairperson and secretary) u have total 8 left acc to circular perm 7!
the Secretary and president is not to be arranged
OHHHH i got it they are fixed right
therefore the rest can be arranged
got it dumb pants
ya dumbpants has got it!
Suppose there is no chairperson and secretary. Now you have eight members. who can be arranged in 7! Now one among the pair of secretary and chairperson can be seated in 8 ways around the table ( the other will be just opposite). so, you have a total of 7! \(\times\) 8