11.
A/100 + B/10 + C =2,48
A=8
B=4
C=2
(8+4)÷2=6
A)50/100+4/100=54/100=0,54(Y)
B)100/100+20/100+3/100=123/100=1,23(Y)
C)700/100+40/100+8/100=748/100=7,48(D)
D)3000/1000+100/1000+9/1000=3109/1000=3,109(Y)