Réponse :
Explications étape par étape
Effectif total = 278
Filles = 123
Garçons = 155
S = 52
L = 129
E = 97
p(g) = 155/78 = 0.5575 = 55.57 %
P(f) = 123/278 = 0.4424 = 44.24%
P(s) = 52/278 = 0.1870 =18.70%
P(L) = 129/278 =0.4640 = 46.40 %
P(E) = 97/278 = 0.3489 = 34.89%