Réponse :
1) p(I) = 1590/26500 = 0.06
p(C) = 23850/26500 = 0.9
p(T) = 1060/26500 = 0.04
2) arbre pondéré
/ I
0.06 /
/.........0.9........ C
\
0.04 \
\ T
3) p(I⁻) = 1 - p(I) = 1 - 0.06 = 0.94
p(C⁻) = 1 - p(C) = 1 - 0.9 = 0.1
p(T⁻) = 1 - p(T) = 1 - 0.04 = 0.96
Explications étape par étape
