S(CAN)/S(ANB) =1/7 => S(ANB)/S(ABC) =7/8
S(ANM)/S(MNB) =3/1 => S(MNB)/S(ANB) =1/4
S(MNB)/S(ABC) =1/4 *7/8 =7/32 => S(MNB)/S(AMNC) =7/25 =0,28 =28%
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S(CAN)/S(ANB) =1/7 => S(ANB)/S(ABC) =7/8
S(ANM)/S(MNB) =3/1 => S(MNB)/S(ANB) =1/4
S(MNB)/S(ABC) =1/4 *7/8 =7/32 => S(MNB)/S(AMNC) =7/25 =0,28 =28%