Question
A box contains some grey, brown and black mini cupcakes. The ratio of the number of grey mini cupcakes to the number of brown mini cupcakes is 9 : 10. The ratio of the number of brown mini cupcakes to the number of black mini cupcakes is also 9 : 10. What is the ratio of the number of grey mini cupcakes to the number of black mini cupcakes in the box?
2 m

Click button first when a symbol is required. X

A box contains some grey, brown and black mini cupcakes. The ratio of the number of grey mini cupcakes to the number of brown mini cupcakes is 9 : 10. The ratio of the number of brown mini cupcakes to the number of black mini cupcakes is also 9 : 10. What is the ratio of the number of grey mini cupcakes to the number of black mini cupcakes in the box?