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Total number of pupils = 60x4=240 (since 1/4 is 60 pupils)
1/8 of total = 1/8 X 240 = 30
Maths = 240-65-60-30 = 85
1/8 of total = 1/8 X 240 = 30
Maths = 240-65-60-30 = 85