Répondre :
A = 0.5*0.8 = 04
B= 4/12+6/12
9/6+5/6
C= (10/14x21/14)+8/14
210/14 + 8/14
218/14
B= 4/12+6/12
9/6+5/6
C= (10/14x21/14)+8/14
210/14 + 8/14
218/14