There is a 50% chance for the coin to either land on heads or tales so you divide 100100100 by 2 to get 50050050 this would work with anything else say you need to figure out the chance of a coin landing on heads and the coin flips 550 times to figure out the chance you do 550 divided by 2 and you get 225. But anyways the answer is 50050050. the reason you divide by two is because the coin has 2 sides, if it were a dice, for instance, you would divide by 6 because it has 6 sides
In order to find b1 from your formula stated we need to do few calculations A=hb1+hb2, as you wee I multiply h with both bases( b1 and b2) I will subtract hb2 from both sides hb1=A-hb2 now I will divide my new expression by h b1=(A-hb2)/h
