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1/3 *{5 *[0,4 +2/5 *1/2]}=
1/3 *{5 *[0,4 +0,2]}=
1/3 *(5 *0,6)=
1/3 *3=1
= 5 *(2/5+2/5*1/2)=
5*(2/5+1/5)=5*3/5=3
Trzecia część wartości wyrażenia to 3:3=1