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A school has two streams from std 1 to 8. There 40 pupils in each class. In one year, the exercise books were supplied to pupils as follows:
Std 1-3………..8 books per pupil
Std 4-5……….10 books per pupil
Std 6-8……….11 books per pupil
What was the total number of books supplied?
A. 5120
B. 3080
C. 6160
D. 154