Today I got into the beginning of new phase on binomial coefficient, which I've touched a little bit before,
it's something about 2 power to the number.
Like how many ways you can get two heads of flipping coins by six times,
it is equivalent to calculate how many ways of choosing 2 people to be committee from 6 people.
Let's keep going, and don't worry, everything is going to be fine, Wallace Tiger : )
