The first principles of heredity; with 75 illustrations and diagrms . -tail is double as great as of getting eitherhead-head or tail-tail.) Similarly, if we toss up three coinswe get the following possibilities : I H-H-H + 3 H-H-T-H3 H-T-T-f-i T-T-T, and so on with more coins. For ten coins simultaneouslytossed up we get the following series of possibilitiesand their relative probabilities. Heads. Tails. RelativeProbability. 10 0 I 9 I 10 8 2 45 7 3 120 6 4 210 5 5 252 4 6 210 3 7 120 2 8 45 I 9 10 0 10 I Fig. 64.—Table of Ten Tossed Coins. [From R. H. Lock, Recent Progress in the Study of Var
The first principles of heredity; with 75 illustrations and diagrms . -tail is double as great as of getting eitherhead-head or tail-tail.) Similarly, if we toss up three coinswe get the following possibilities : I H-H-H + 3 H-H-T-H3 H-T-T-f-i T-T-T, and so on with more coins. For ten coins simultaneouslytossed up we get the following series of possibilitiesand their relative probabilities. Heads. Tails. RelativeProbability. 10 0 I 9 I 10 8 2 45 7 3 120 6 4 210 5 5 252 4 6 210 3 7 120 2 8 45 I 9 10 0 10 I Fig. 64.—Table of Ten Tossed Coins. [From R. H. Lock, Recent Progress in the Study of Variation. Heredity, and Evolution.) The same series plotted in a curve gives us Fig. 65. We see here once more that the extreme possibilities arerare, while the medium possibility (5 H - 5 T) is the mostfrequent one, the other possibilities gradually becomingless towards both ends of the curve. The probabilitycurve of ten coins is still rather angular, but if we constructthe curve for the relative probabilities of a great number 148 THE FIRST PRINCIPLES OF HEREDITY. Tails I 2 3 4 5 6 7 8 Fig. 65.—Curve of Ten Tossed Coins. 0 {From R. H. Lock, Recent Progress in the Study of Variation, Heredity, and Evolution.)
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