A number considered in relative relation to a whole number.
The answer is D:10 cm, I just took it and got this.
Given:
The number of checkers is 12.
The number of red is 5/6 times of 12.
Multiply 5/6 and 12 to find the number of red.



Hence there are 10 red in checkers.
Here you go pall, have a nice day