Question
The average number of girls in 2A, 2B and 2C is 11. This is 4 more than the average number of boys in the 3 rooms. 37  of the total number of boys are in 2C. 32 of the number of boys in 2B is the same as 37 of the total number of boys in the 3 rooms. What fraction of the total number of girls in the 3 rooms is in 2A if there are 18 pupils in 2A?
5 m

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The average number of girls in 2A, 2B and 2C is 11. This is 4 more than the average number of boys in the 3 rooms. 37  of the total number of boys are in 2C. 32 of the number of boys in 2B is the same as 37 of the total number of boys in the 3 rooms. What fraction of the total number of girls in the 3 rooms is in 2A if there are 18 pupils in 2A?