16 38 22 45 40 28 46 40 15 34
26 42 45 34 44 18 43 36 23 40
29 28 46 21 25 47 49 17 31 20
18 44 30 48 50 22 49 32 48 25
33 38 31 49 48 35 16 34 49 50
25 47 48 18 33 42 47 43 18 22
34 16 40 23 37 45 49 23 39 35
32 36 43 22 37 17 35 38 21 29
15 23 30 35 26 27 42 38 33 31
[ 15 - 20 ] 13
[ 20 - 25 ] 16
[ 25 - 30 ] 10
[ 30 - 35 ] 19
[ 35 - 40 ] 14
[ 40 - 45 ] 11
[ 45 - 50 ] 17
---------
100
C1= L1 + h1/n1 [ N/4 - f1 ]
C1= 20 + 5/16 [ 100/4 - 13 ]
C1= 20 + 0.31 [ 12 ]
C1= 20 + 3.72
C1= 23.72
_____________________________________
C2= L2 + h2/n2 [ 2N/4 - f2 ]
C2= 30 + 5/19 [ 50 - 39 ]
C2= 30 + 0.26 [ 11 ]
C2= 30 + 2.86
C2= 32.86
_____________________________________
C3= L3 + h3/n3 [ 3N/4 - f3 ]
C3= 40 + 5/11 [ 75 - 72 ]
C3= 40 + 0.45 [ 3 ]
C3= 40 + 1.35
C3= 41.35
_____________________________________
D.I= C3 - C1
D.I= 41.35 - 23.72
D.I= 17.63
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