What is the sum of this arithmetic series 7.6+6.3+5+3.7+2.4+1.1+(-0.2)+(-1.5)

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c = f