Online Course Discussion Forum

MC II-B Math Hw Help

Picture of Derek Wong
MC II-B Math Hw Help
by Derek Wong - Saturday, December 8, 2018, 6:35 PM


For 2.24, I'm having trouble arranging the boys. I have an idea on how to arrange the girls but I don't know what's a good next step.

For 2.26, I am completely lost in the wording of the question and I don't know how to start it.


Picture of Eddy zheng
Re: MC II-B Math Hw Help
by Eddy zheng - Sunday, December 9, 2018, 1:39 PM

I have the same problem I have no idea how to do it

Picture of David Reynoso
Re: MC II-B Math Hw Help
by David Reynoso - Tuesday, December 11, 2018, 11:53 AM

For 24, try starting with the girls. Out of the $10$ spots there are for the students to finish pick some for the girls and leave the rest for the boys.

On 26, to choose a team you need to make sure that for each soldier, the soldier's boss (sergeant), or the boss of their boss (officer) is also part of the team. First you need to decide if the team will have (i) $2$ officers OR (ii) $6$ sergeants, and then pick the soldiers. For each of the two cases, how many soldiers do you have available? In how many ways can you choose the officers or sergeants?