A six-faced dice is so biased that it is twice as likely to show an
even number as an odd number when thrown. It is thrown twice, the probability
that the sum of two numbers thrown is even is
`1//12`
b. `1//6`
c. `1//3`
d. `5//9`
A. `1//12`
B. `1//6`
C. `1//3`
D. `5//9`