1) Toss a coin 30 times. compute the chance that there will be exactly 8 heads amongst the first 13 tosses, and exactly 4 heads among the last 7 tosses.

2) Toss a coin 30 times. Calculate the probability of getting 30 tails and 15 heads.

3) What is the prob. of getting at least 3 heads in 20 tosses

4) Toss a coin 10 times. The total number of heads is Y. What is the prob. distribution of Y?