C (60,6) look it up to be
If you multiply out the binomials, you get a 67 term polynomial w power of 66. Why ?
The power of the polynomial is the sum of the powers of the first terms of each binomial.
The sum of numbers 1 to 11 = 11 (12) / 2 [ Gauss's student theorem ] = 66
The 7th term will have a power of 60
There is no binomial raised to the power of 66 that equals this polynomial.
So I do not see any solution.
Are you sure you got the problem statement correct ??