428
48/32 = x/(100-32)
x = 68*48/32 = 102 persone
432
B = 40%
C = (100-40) = 60%
Bf = 40*3/4 = 30%
Bm = B-Bf = 10%
poiché f = m = 50%, allora :
# Cf = 50-30 = 20%
# Cm = C-Cf = 60-20 = 40%
433
1,22p = 145
p = 145/1,22 = 118,85 €
436
n = 276*(100-15)/100 = 276*0,85 = 234,6 (235)