A coin is flipped 42 times, resulting in 14 heads and 28 tails. What is the observed probability of the coin landing on heads?

A. 2/3
B. 2/42
C. 1/3
D. 1/2

The observed probability of the coin landing on heads can be calculated by dividing the number of heads by the total number of flips.

So, the observed probability of the coin landing on heads is 14/42 = 1/3.

Therefore, the correct answer is:

C. 1/3