Question
Adam has stickers in 4 colours.
49 of the stickers are blue.
The rest of the stickers are green, yellow and red in the ratio of 3 : 5 : 7.
If there are 30 more yellow stickers than green stickers,
how many blue stickers are there?
3 m

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Adam has stickers in 4 colours.
49 of the stickers are blue.
The rest of the stickers are green, yellow and red in the ratio of 3 : 5 : 7.
If there are 30 more yellow stickers than green stickers,
how many blue stickers are there?