Răspuns :
I=30%T=30T/100=3T/10
II=4T/10
III=T-(I+II)
III=T-(3T/10+4T/10)
III=T-7T/10
III=3T/10
84=3T/10
840=3T
280=T
II=4T/10
III=T-(I+II)
III=T-(3T/10+4T/10)
III=T-7T/10
III=3T/10
84=3T/10
840=3T
280=T