Assume that the probability of obtaining heads when tossing a coin is .

a. What is the probability of obtaining the first head on the (k + 1)-th toss?

A) (1 )^kk

B) (1 )

C) (1 )^k

D) (1 )^k

b. What is the expected number of heads if the coin is tossed k times? Select one of the below four options.

A) k

B) k

C) ^k

D) (1 )^k