In: Math
Ken has a coin that has probability 1/5 of landing Heads.
Mary has a coin that has probability 1/3 of landing Heads.
They toss their coins simultaneously, repeatedly.
Let X be the number of tosses until Ken gets his first Heads.
Let Y be the number of tosses until Mary gets her first Heads. Find:
Let U = min(X,Y) and V = max(X,Y)
(d) For k = 1, 2, 3,... , find a formula for P(U = k).
(e) For k = 1, 2, 3,... , find a formula for P(V > k). HINT: Inclusion-Exclusion.