7/13*0.8+1/13*4/5+5/13*0.08

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7/13*0.8+1/13*4/5+5/13*0.08
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7/13*0.8+1/13*4/5+5/13*0.08
7/13*0.8+1/13*4/5+5/13*0.08

7/13*0.8+1/13*4/5+5/13*0.08
7/13*0.8+1/13*4/5+5/13*0.08
=(7*0.8+1*4/5+5*0.08)/13
=(28/5+4/5+2/5)/13
=(28+4+2)/13*5
=34/65

1/13*(5.6 0.8 0.4)
=6.8/13
=