Question: A coin which lands heads with probability p is tossed repeatedly. Assuming independence of the tosses, find formula for
a) P(exactly 5 heads appear in the first 9 tosses):
b) P(the first head appears on the 7th toss)
c) P(the fifth head appears on the 12th toss):
d) P(the same number of heads appear in the first 8 tosses as in the next 5 losses).