In a population of people, the probability of having a certain height is found in the table below:
Height Probability
150 cm 4/15
165 cm 1/15
135 cm 8/15
170 cm 2/15

What is the expected height of a randomly chosen person in this population?
O 145 2/3 cm
O 165 1/3 cm
O 135 cm
O 155 cm.