Bonjour
1)
1 - (1/8 + 1/6)
= (1 x 24) / (1 x 24) + [(1 x 3) / (8 x 3) + (1 x 4) / (6 x 4)]
= 24/24 - (3/24 + 4/24)
= 24/24 - 7/24
= 17/24
Après avoir donné leur part à Marc et Fabrice il reste 17/24 des gains.
17/24 x 1/5 = 17/120
Bruno aura 17/120 du gain.
1 - (1/8 + 1/6 + 17/120)
= (1 x 120) / (1 x 120) - [(1 x 15) / (8 x 15) + (1 x 20) / (6 x 20) + 17/120]
= 120/120 - (15/120 + 20/120 + 17/120
= 120/120 - 52/120
= 68/120
= (4 x 17) / (4x 30)
= 17/30
Boris aura 17/30 des gains.
2)
240 x 17/30 = 136 €
136 > 125
Boris pourra acheter son blouson.
