OpenStudy (anonymous):

8 people are to form 2 queues of 4. in how many ways can this be done if jim will only stand in the left hand queue

5 years ago
OpenStudy (anonymous):

err i think it will be \[\left(\begin{matrix}7 \\ 4\end{matrix}\right)\]

5 years ago
OpenStudy (anonymous):

what does that mean?

5 years ago
OpenStudy (anonymous):

7C4 it means 7!/4!3! it is numberof ways of picking 4 people out of 7

5 years ago
OpenStudy (anonymous):

your answer is incorrect

5 years ago
OpenStudy (anonymous):

the answer is 20160

5 years ago
OpenStudy (anonymous):

That impossible 20140 is more that 8C4

5 years ago