In reply to SUNODH:
SystemVerilog-2017 LRM Section 19.5.1 explains the value distribution
For fixed bins the 13 values are distributed within 4 bins as :: <1,2,3>, <4,5,6>, <7,8,9>, <10,11,13,15>
For the 2nd case 13 bins are generated , 1 bin for each value from 1:10 , 11 , 13 , 15 .
Is they are any method like a display statement to check bins it created for our coverpoint during simulation?
As per my understanding one would have to generate coverage report ( html or text format ) to observe the bins generated .