1.  If carton containing a dozen mirrors is dropped, which of the following cannot be the ratio of broken mirrors to unbroken mirrors ?
A. 2 : 1
B. 3 : 1
C. 3 : 2
D. 7 : 5

Answer: Option C

Explanation:

For dividing 12 into two whole numbers, the sum of the terms of the ratio must be a factor of 12. so, they cannot be in the ratio 3 :2.