We can call three points a 1 four points 1 six points 1 common points with the denominator "several/several equals = several parts, for example, 5/3 = 5/3.

6/7 = 7 choose 6.

1/3=4/ 12

1/4=3/ 12

1/6=2/ 12

Let's add them up.

4/ 12+3/ 12+2/ 12=9/ 12

1 minus 9/ 12.

1-9/ 12=3/ 12

In other words, 3/ 12 of the total is 3.