The pie charts show percentages of all university students and girls by stream. Total enrolment is 5000, including 1500 girls. What is the ratio of Arts boys to Management girls?
Arts contains 20% of all students, or 1000, and 30% of girls, or 450. Arts boys therefore number 1000−450 = 550. Management girls are 15% of 1500 = 225. Ratio $550:225=22:9$, D.
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