White shapes and black shapes are used in a game. Some of the shapes are circles. All the other shapes are squares. The ratio of the number of white shapes to the number of black shapes is 3 : 7 The ratio of the number of white circles to the number of white squares is 4 : 5 The ratio of the number of black circles to the number of black squares is 2 : 5 Work out what fraction of all the shapes are circles.
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Science is the pursuit and application of knowledge and understanding of the natural and social world following a systematic methodology based on evidence. ... Evidence. Experiment and/or observation as benchmarks for testing hypotheses.
The natural taxonomy of the empirical sciences would break the sciences down into three basic groups: the physical sciences (physics, astronomy, chemistry, geology, metallurgy), the biological sciences (zoology, botany, genetics, paleontology, molecular biology, physiology), and the psychological sciences (psychology
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