A coin that is tossed will land heads or tails, and each outcome has equal probability. What is the
probability that the coin will land heads at least once on two tosses?
A. 1/4
B. 1/3
C. 1/2
D. 2/3
E. 3/4

I selected the right answer that is E.
I've calculated it by 1/4 + 1/4 + 1/4 i.e. (H,T)(H,H)(T,H)
or we can calculate it by 1- prob. of not having head.

please lemme know whether i am correct.