The table below represents a frequency distribution of marks of 100 students in mathematics in a faculty of engineering. If four students are selected at random to represent the faculty in a chess tournament, determine the probability of that all four students are selected from the highest class ?interval (90 marks or more) Marks 40<50 50<60 60-70 70-80 80-90 90<100 Number of Students 20 14 16 12 10 28 0.7534 0.5221 0.0052 0.0035 0.0083 0.5552

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