Question
PSLE
The ratio of the number of mocha buns to vanilla buns is 2 : 7. The ratio of the number of mango buns to the total number of mocha buns and vanilla buns is 4 : 1. What fraction of the buns are vanilla buns?
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PSLE
The ratio of the number of mocha buns to vanilla buns is 2 : 7. The ratio of the number of mango buns to the total number of mocha buns and vanilla buns is 4 : 1. What fraction of the buns are vanilla buns?