@KarenCampe@jamestanton Flaw in 2&1&1: with 2 balls in first bin there are 12 ways: 4C2 • 2 = 12, or write them out:
[12][3][4] + [12][3][4]
[13][2][4] + [13][4][2]
[14][2][3] + [14][3][2]
[23][1][4] + [23][4][1]
[24][1][3] + [24][3][1]
[34][1][2] + [34][2][1]
Also 12 with other bins with 2: 3•12 = 36
@arjanvandermeij @SvdK@volkskrant Rudy Kousbroek schreef in 1990 al in het boek "Einsteins poppenhuis", in het essay getiteld 'kunstmatige domheid', waarin hij oa zegt "ongeletterdheid is niet salonfähig, ongecijferdheid helaas wel". Helaas is dit alleen maar verslechterd.
@diegorattaggi radius outer circle = 6, then radius biggest green circle (right green one) = 2 and radius left green circle = 1.
With several times Pythagoras: radius smallest circle = 6/7; etc.