- ( ) .
, . , . - . , , . , .
Ø . , . , . , , . . , 25%, 20% , 80% , .
. .
10 . . : r = 25%, rr = 10%, r = 15% (. 9.9).
. 9.9. , 10 . .
, . , (. 9.10).
. 9.10.
:
, 10 . . 10 . . 25 . .
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Ø , . , . , . , , . . , 25%, 20% , 80% , , .
, , , . .
10 . . : cr = 25%, rr = 10%, er = 15% (. 9.11).
. 9.11. , 10 . .
, . , (. 9.12).
.9.12.
:
, 10 . . 10 . . 25 . .