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Tu es dans toutes mes pens?
You're in my thoughts?
3 pens
to go shopping
15 pens. 5 pencils.
If 8/11 pens are blue, then 3/11 are black.
There are 12 black pens, so 12/(3/11) = 44. So there are 44 pens total.
44 * (8/11) tells us that 32 pens are black.
3b + r = 20
20/4=5
5x3=15 blue pens
5x1= 5 red pens