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 2 years ago
At the head table at a banquet are seated two senators, two governors, and three mayors. Find the number of ways in which these seven people can be seated under the conditions described: A mayor is at each end and the senators are in consecutive seats
 2 years ago
At the head table at a banquet are seated two senators, two governors, and three mayors. Find the number of ways in which these seven people can be seated under the conditions described: A mayor is at each end and the senators are in consecutive seats

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satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1361848754746:dw

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0lots of applications of the counting principle two choices for mayor

electronicz
 2 years ago
Best ResponseYou've already chosen the best response.0ok so how will u do the senators?

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0oh i read it wrong, sorry

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0label the seats 1 to 7 then senators can be in seats 2, 3 3, 4 4, 5 5, 6 and they can switch chairs between them, so there are 8 possibilities for the senators

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0seat number 1 and 7 must contain mayors, so there are \(3\times 2=6\) choices for seat 1 and 7

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0then you have 3 chairs left to fill , and 3 people left to sit, so they are \(3\times 2=6\) choices for the remaining 3 chairs

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0multiply all these choices together, and unless i screwed up you get the right answer

electronicz
 2 years ago
Best ResponseYou've already chosen the best response.0... the answer is 12

Mertsj
 2 years ago
Best ResponseYou've already chosen the best response.1I do not see how the answer can only be 12.

electronicz
 2 years ago
Best ResponseYou've already chosen the best response.0well i guess order doesn't matter i nthnis case

electronicz
 2 years ago
Best ResponseYou've already chosen the best response.0yea its 12... hey can u just help me on this question? how many committees of four can be chosen from twelve students? how many of these will include a given student? how many will exclude a given student?

Mertsj
 2 years ago
Best ResponseYou've already chosen the best response.1It's a comination problem so 12 choose 4

electronicz
 2 years ago
Best ResponseYou've already chosen the best response.0yes what about the last two questions?

Mertsj
 2 years ago
Best ResponseYou've already chosen the best response.1If we want to include a given student, we have already made one choice so we now must choose3 students from the remaining 11

Mertsj
 2 years ago
Best ResponseYou've already chosen the best response.1So I think it would be 11 choose 3

Mertsj
 2 years ago
Best ResponseYou've already chosen the best response.1I'm not really very good with probability.

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0you have to multiply all the choices together, as i wrote above

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0unless i screwed up, it should be \(8\times 6\times 6\)
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