Réponses

2013-12-19T16:15:40+01:00
B=5/4x(1/3-1/6)x1/2
B=5/4x(2/6-1/6)x1/2
B=5/4x1/6x1/2
B=5/48

C=(3/4+5/6)/(5/6x12/35)
C=(9/12+10/12)/(60/210)
C=(19/12)/2/7
C=19/12x7/2=133/24
2013-12-19T16:27:52+01:00
Bonsoir
B=5/4*(1/3-1/6)*1/2
tu commences par l'intérieur de la ()
B = 5/4 * (2/6 -1/6) *1/2
B = 5/4 * 1/6 * 1/2
B = 5/48

C=(3/4+5/6)/(5/6*12/35)

C ( 18/24 + 20/24)/ ( 60/210)
C = 38/24 x 7/2 = 266/48 = 133/24