How many 2016 digits number are there so that their leftmost and right most digits both are even?
They can start with a 1 3 5 7 or 9 5 numbers odd or 2 4 6 8 4 numbers even
the last number can be even or odd with same frequency
4 out of 9 x 1 out of 2
4/9 x 1/2 = 4/18 = 2 / 9
