Posted by **Anonymous** on Tuesday, November 30, 2010 at 2:41pm.

Stan wants to arrange his books in order of size. Half of the books are medium, 2/10 are large and 12 are small. What is the total number of books Stan has?

- math -
**Ms. Sue**, Tuesday, November 30, 2010 at 2:45pm
7/10 of the books are not small.

3/10x = 12

x = 12 / (3/10)

x = 12 * (10/3)

x = 120/3

x = 40

- math -
**prakash**, Tuesday, November 30, 2010 at 2:49pm
let, total number of books= X

Small= 12

Remaining books = X-12

now,the remaining books comprise:

1/2X= Medium

2/10X= Large

Therefore,

1/2X+2/10X=X-12

Solve for X and you will get the answer!!

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