Question

Shops 'A' and 'B' together purchased a total of 9,200 notebooks in the ratio of 2:7 for shop 'A' and 4:9 for shop 'B'. Shop 'A' managed to sell 25% of its stock, while shop 'B' sold 2,600 notebooks. Calculate the ratio of the remaining unsold notebooks in shop 'A' to those in shop 'B'.

A 14:15
B 7:9
C 9:10
D 17:20
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