help m please:
200 identical chairs are to be distributed into 4 rooms. If eachroom may have 20, 40, 60, 80 or 100 chairs, how many ways can this be done?

Question

help m please: 
200 identical chairs are to be distributed into 4 rooms. If eachroom may have 20, 40, 60, 80 or 100 chairs, how many ways can this be done?

shane_b · Answer

No my strong area but I did find this answer to this question:

anonymous · Answer

possible combos are :
(100,40,40,20)->4!/2! = 12
(100,60,20,20)->12
(80,60,40,20)->4! = 24
(80,40,40,40)->4
(60,20,60,60)->4
(40,60,40,60)->12
=>12+12+24+4+4+12 = 68

shane_b · Answer

Even simpler :)  GJ

anonymous · Answer

thank you :)

raden · Answer

Aryang@  is it filling slot rule??

anonymous · Answer

i dont know if it is called by some particular name,,sorry..

raden · Answer

in indonesia called filling slot, how about there??

anonymous · Answer

i dont know..used basic permutations just,,which i learnt some time ago..

raden · Answer

nope,, thank's ...

raden · Answer

shane_B@ can u reexplain ur answer, i still dont get the formula u use?

shane_b · Answer

I found that answer online.  I've never taken classes on permutations but I thought I'd post it anyway in case it helped.  I understand @Aryang's answer which I think is more clear.

raden · Answer

hmmm, i will try get it... thank's for all