Question

There is a box and inside it is a bunch of hats. 1/6 of the hats are red, 1/3 of the hats are blue. 3/7 of the remainder are green. There are 27 green hats. How many hats are there in total?
1/6 + 1/3 = 1/6 + 2/6 = 3/6 = 1/2

so half are red or blue, leaving half

3/7 * 1/2 = 3/14 are green

so

(3/14) x = 27

I think you can find x now. 9*14

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