Bonjour,
Alphonse: 3/20
Bernadette: 3/20 * 2 = 6/20 = 3/10
Chuck: 3/4 de 3/10
(3*3)/ ( 4*10) = 9/ 40
Alphonse:
3/20 de 1 200
(3*1200)/20 =>180€
Bernadette:
3/10 de 1 200
(3* 1200)/10 => 360€
Chuck:
9/40 de 1 200
(9*1 200)/40 => 270€
Helmut:
1 200 -180-360-270 =>390€