Question 255260: From a group of green monkeys, 10 females leave. At this point there are 3 males for every female. Then 25 males leave, at which point there are two males for every female. How many females were there originally?
Answer by CharlesG2(834)   (Show Source):
You can put this solution on YOUR website! From a group of green monkeys, 10 females leave. At this point there are 3 males for every female. Then 25 males leave, at which point there are two males for every female. How many females were there originally?
F=females
M=males
G=group
G=M+F
used EXCEL
G=F2+10+M
F F-10 M F+M M-25 F2 F2+10 G G-F-M
19 9 27 46 2 1 11 38 -8
20 10 30 50 5 2.5 12.5 42.5 -7.5
21 11 33 54 8 4 14 47 -7
22 12 36 58 11 5.5 15.5 51.5 -6.5
23 13 39 62 14 7 17 56 -6
24 14 42 66 17 8.5 18.5 60.5 -5.5
25 15 45 70 20 10 20 65 -5
26 16 48 74 23 11.5 21.5 69.5 -4.5
27 17 51 78 26 13 23 74 -4
28 18 54 82 29 14.5 24.5 78.5 -3.5
29 19 57 86 32 16 26 83 -3
30 20 60 90 35 17.5 27.5 87.5 -2.5
31 21 63 94 38 19 29 92 -2
32 22 66 98 41 20.5 30.5 96.5 -1.5
33 23 69 102 44 22 32 101 -1
34 24 72 106 47 23.5 33.5 105.5 -0.5
35 25 75 110 50 25 35 110 0
36 26 78 114 53 26.5 36.5 114.5 0.5
37 27 81 118 56 28 38 119 1
35 female monkeys in a group of 110 monkeys
110-10=100 --> 75 males, 25 females 3:1
100-25=75 --> 50 males, 25 females 2:1
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