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2 2(i+1) 2 i (2)P(xX≤)=F 2(1+) -F 10 14+1)21422i+1 4--1004100100 - 环数12345678910 概 19171513119 531 10010010010010010010010010010(2) ) 2 ) ( 2( 1) ) ( 2 2( 1) ( i F i F i X i P − + = + ( < ≤ 2) ) 10 ) ( 10 ) ( 10 10 P( < X ≤ = F F 14 1 14 2 1 + + 2 2 (i ii ) = ⋅ − ⋅ = 4 100 4 100 100 ( ) ( ,, , ) i = 01 9 L 环数 1 2 3 4 5 6 7 8 9 10 概率 1100 3100 5100 7100 9100 11 100 13 100 15 100 17 100 19 100
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