Maths from Scratch for Biologists by Alan J. Cann

Author:Alan J. Cann [Cann, Alan J.]
Language: eng
Format: azw3, pdf
Publisher: Wiley
Published: 2013-04-25T04:00:00+00:00

2. The probability of selecting, in order, brown, brown and then white:

3. If, however, we are not interested in the order (i.e. brown, brown, white) but just the overall outcome (i.e. two brown, one white), the probability is different. The possible outcome of three selections with replacement is shown in Table 9.1. Thus, the sum of probabilities of a set of mutually exclusive, exhaustive outcomes is 1, but the probability of two brown mice and one white mouse, irrespective of the order of selection is as shown in Table 9.2. Note the difference in outcome between an ordered selection (probability = 0.032) and selection irrespective of order (probability = 0.096) = the sum of all the possible ordered selections.

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