.
.
. 5. ( ) .
7: S1 S2.
S1 (. . 5) A70B30, .. % + % = 100%; S2 4060; S3 2080.
.
, , , . ( . 5 ) '''' , () .
8: . 5 '''' 1, , S1 L S (). , .. , ( 2). , S1 : + .
, , :
, , , :
S / = 1 / 2 (3),
S - , .
:
S / 12 = / 2 = / 1 (4),
ME= .
.
9: 1000 S: A50B50 (. . 6).
. 6.
:
S / 12 = / 1
= S 1 / 12 = 1000 30 / 80 = 375 ().
10: , 50% , 200 : 8020?
, :
S / 12 = / 2 S = ∙12 / 2
S = 200 80 / 50 = 320 .