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OpenStudy (anonymous):
Shoe sizes include both whole numbers and 'half sizes'. 47/50 of Year 12 students have a shoe size greater than 7 ¹/2 (7.5), and 9/50 students have a shoe size less than 8 ¹/2 (8.5). Calculate the probability that a Year 12 student has a shoe size of a. 8 or large b. 8 or smaller c. exactly 8
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