there are only chinese and malay pupils in a hall


There are only Chinese and Malay pupils in a hall. The ratio of the number of boys to the number of girls is 2:3. The ratio of the number of Chinese boys to the number of Malay boys is 5:3. There are 178 more Chinese boys than Malay boys. How many girls are there in the hall?

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Mathematics: there are only chinese and malay pupils in a hall
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